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-rw-r--r--ares/configure.ac20
-rw-r--r--ares/m4/cares-compilers.m4302
-rw-r--r--ares/m4/cares-confopts.m476
-rw-r--r--configure.ac22
-rw-r--r--m4/curl-compilers.m4295
-rw-r--r--m4/curl-confopts.m476
6 files changed, 704 insertions, 87 deletions
diff --git a/ares/configure.ac b/ares/configure.ac
index 39c249554..685caa131 100644
--- a/ares/configure.ac
+++ b/ares/configure.ac
@@ -9,6 +9,7 @@ AM_CONFIG_HEADER([config.h])
AM_MAINTAINER_MODE
CARES_CHECK_OPTION_DEBUG
+CARES_CHECK_OPTION_OPTIMIZE
CARES_CHECK_OPTION_WARNINGS
dnl SED is mandatory for configure process and libtool.
@@ -67,7 +68,7 @@ AC_CANONICAL_HOST
dnl Get system canonical name
AC_DEFINE_UNQUOTED(OS, "${host}", [cpu-machine-OS])
-AC_PROG_CC
+CARES_CHECK_PROG_CC
AM_PROG_CC_C_O
AC_PROG_INSTALL
@@ -142,9 +143,10 @@ dnl platform/compiler/architecture specific checks/flags
dnl **********************************************************************
CARES_CHECK_COMPILER
-CARES_PROCESS_CC_BASIC_OPTS
-CARES_PROCESS_CC_DEBUG_OPTS
-CARES_PROCESS_CC_WARNING_OPTS
+CARES_SET_COMPILER_BASIC_OPTS
+CARES_SET_COMPILER_DEBUG_OPTS
+CARES_SET_COMPILER_OPTIMIZE_OPTS
+CARES_SET_COMPILER_WARNING_OPTS
case $host in
#
@@ -882,5 +884,15 @@ fi
CARES_PRIVATE_LIBS="$LIBS"
AC_SUBST(CARES_PRIVATE_LIBS)
+dnl squeeze whitespace out of some variables
+
+CFLAGS=`eval echo $CFLAGS`
+CPPFLAGS=`eval echo $CPPFLAGS`
+DEFS=`eval echo $DEFS`
+LDFLAGS=`eval echo $LDFLAGS`
+LIBS=`eval echo $LIBS`
+
+CARES_PRIVATE_LIBS=`eval echo $CARES_PRIVATE_LIBS`
+
AC_CONFIG_FILES([Makefile libcares.pc])
AC_OUTPUT
diff --git a/ares/m4/cares-compilers.m4 b/ares/m4/cares-compilers.m4
index 5dcf03ee4..8af70637b 100644
--- a/ares/m4/cares-compilers.m4
+++ b/ares/m4/cares-compilers.m4
@@ -16,7 +16,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
-# serial 2
+# serial 3
dnl CARES_CHECK_COMPILER
@@ -28,11 +28,33 @@ AC_DEFUN([CARES_CHECK_COMPILER], [
compiler_id="unknown"
compiler_num="0"
#
+ flags_dbg_all="unknown"
+ flags_dbg_yes="unknown"
+ flags_dbg_off="unknown"
+ flags_opt_all="unknown"
+ flags_opt_yes="unknown"
+ flags_opt_off="unknown"
+ #
CARES_CHECK_COMPILER_DEC
CARES_CHECK_COMPILER_IBM
CARES_CHECK_COMPILER_INTEL
CARES_CHECK_COMPILER_GNU
#
+ if test "$compiler_id" = "unknown"; then
+ cat <<_EOF 1>&2
+***
+*** Warning: This configure script does not have information about the
+*** compiler you are using, relative to the flags required to enable or
+*** disable generation of debug info, optimization options or warnings.
+***
+*** Whatever settings are present in CFLAGS will be used for this run.
+***
+*** If you wish to help the c-ares project to better support your compiler
+*** you can report this and the required info on the c-ares development
+*** mailing list: http://cool.haxx.se/mailman/listinfo/c-ares/
+***
+_EOF
+ fi
])
@@ -48,6 +70,12 @@ AC_DEFUN([CARES_CHECK_COMPILER_DEC], [
test "$curl_cv_have_def___DECC_VER" = "yes"; then
AC_MSG_RESULT([yes])
compiler_id="DECC"
+ flags_dbg_all="-g -g0 -g1 -g2 -g3"
+ flags_dbg_yes="-g2"
+ flags_dbg_off="-g0"
+ flags_opt_all="-O -O0 -O1 -O2 -O3 -O4"
+ flags_opt_yes="-O1"
+ flags_opt_off="-O0"
else
AC_MSG_RESULT([no])
fi
@@ -71,6 +99,19 @@ AC_DEFUN([CARES_CHECK_COMPILER_GNU], [
gccvhi=`echo $gccver | cut -d . -f1`
gccvlo=`echo $gccver | cut -d . -f2`
compiler_num=`(expr $gccvhi "*" 100 + $gccvlo) 2>/dev/null`
+ flags_dbg_all="-g -g0 -g1 -g2 -g3"
+ flags_dbg_all="$flags_dbg_all -ggdb"
+ flags_dbg_all="$flags_dbg_all -gstabs"
+ flags_dbg_all="$flags_dbg_all -gstabs+"
+ flags_dbg_all="$flags_dbg_all -gcoff"
+ flags_dbg_all="$flags_dbg_all -gxcoff"
+ flags_dbg_all="$flags_dbg_all -gdwarf-2"
+ flags_dbg_all="$flags_dbg_all -gvms"
+ flags_dbg_yes="-g"
+ flags_dbg_off="-g0"
+ flags_opt_all="-O -O0 -O1 -O2 -O3 -Os"
+ flags_opt_yes="-O2"
+ flags_opt_off="-O0"
else
AC_MSG_RESULT([no])
fi
@@ -87,6 +128,19 @@ AC_DEFUN([CARES_CHECK_COMPILER_IBM], [
if test "$curl_cv_have_def___IBMC__" = "yes"; then
AC_MSG_RESULT([yes])
compiler_id="IBMC"
+ flags_dbg_all="-g -g0 -g1 -g2 -g3"
+ flags_dbg_yes="-g"
+ flags_dbg_off=""
+ flags_opt_all="-O -O0 -O1 -O2 -O3 -O4 -O5"
+ flags_opt_all="$flags_opt_all -qnooptimize"
+ flags_opt_all="$flags_opt_all -qoptimize=0"
+ flags_opt_all="$flags_opt_all -qoptimize=1"
+ flags_opt_all="$flags_opt_all -qoptimize=2"
+ flags_opt_all="$flags_opt_all -qoptimize=3"
+ flags_opt_all="$flags_opt_all -qoptimize=4"
+ flags_opt_all="$flags_opt_all -qoptimize=5"
+ flags_opt_yes="-O2"
+ flags_opt_off="-qnooptimize"
else
AC_MSG_RESULT([no])
fi
@@ -106,8 +160,27 @@ AC_DEFUN([CARES_CHECK_COMPILER_INTEL], [
CURL_CHECK_DEF([__unix__], [], [silent])
if test "$curl_cv_have_def___unix__" = "yes"; then
compiler_id="ICC_unix"
+ flags_dbg_all="-g -g0"
+ flags_dbg_yes="-g -fp"
+ flags_dbg_off="-g0"
+ flags_opt_all="-O -O0 -O1 -O2 -O3 -Os"
+ flags_opt_yes="-O2"
+ flags_opt_off="-O0"
else
compiler_id="ICC_windows"
+ flags_dbg_all="/ZI /Zi /zI /zi /ZD /Zd /zD /zd /Z7 /z7"
+ flags_dbg_all="$flags_dbg_all /debug"
+ flags_dbg_all="$flags_dbg_all /debug:none"
+ flags_dbg_all="$flags_dbg_all /debug:minimal"
+ flags_dbg_all="$flags_dbg_all /debug:partial"
+ flags_dbg_all="$flags_dbg_all /debug:full"
+ flags_dbg_all="$flags_dbg_all /debug:semantic_stepping"
+ flags_dbg_all="$flags_dbg_all /debug:extended"
+ flags_dbg_yes="/Zi /Oy-"
+ flags_dbg_off=""
+ flags_opt_all="/O /O0 /O1 /O2 /O3 /Os"
+ flags_opt_yes="/O2"
+ flags_opt_off=""
fi
compiler_num="$curl_cv_def___INTEL_COMPILER"
else
@@ -116,12 +189,13 @@ AC_DEFUN([CARES_CHECK_COMPILER_INTEL], [
])
-dnl CARES_PROCESS_CC_BASIC_OPTS
+dnl CARES_SET_COMPILER_BASIC_OPTS
dnl -------------------------------------------------
-dnl Sets compiler options/flags which are independant
-dnl of configure's debug or warnings options.
+dnl Sets compiler specific options/flags which do not
+dnl depend on configure's debug, optimize or warnings
+dnl options.
-AC_DEFUN([CARES_PROCESS_CC_BASIC_OPTS], [
+AC_DEFUN([CARES_SET_COMPILER_BASIC_OPTS], [
AC_REQUIRE([CARES_CHECK_COMPILER])dnl
#
if test "$compiler_id" = "DECC"; then
@@ -174,44 +248,134 @@ AC_DEFUN([CARES_PROCESS_CC_BASIC_OPTS], [
])
-dnl CARES_PROCESS_CC_DEBUG_OPTS
+dnl CARES_SET_COMPILER_DEBUG_OPTS
dnl -------------------------------------------------
-dnl Sets compiler options/flags which depend on
-dnl configure's debug given option.
+dnl Sets compiler specific options/flags which depend
+dnl on configure's debug option.
-AC_DEFUN([CARES_PROCESS_CC_DEBUG_OPTS], [
+AC_DEFUN([CARES_SET_COMPILER_DEBUG_OPTS], [
AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl
AC_REQUIRE([CARES_CHECK_COMPILER])dnl
#
- if test "$want_debug" = "yes"; then
- CFLAGS="$CFLAGS -g"
+ if test "$compiler_id" != "unknown"; then
+ #
+ ac_save_CFLAGS="$CFLAGS"
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ #
+ honor_debug_option="yes"
+ CARES_VAR_STRIP([CFLAGS],[${flags_dbg_all}])
+ CARES_VAR_STRIP([CPPFLAGS],[${flags_dbg_all}])
+ if test "$want_debug" = "yes"; then
+ CFLAGS="$CFLAGS $flags_dbg_yes"
+ AC_MSG_CHECKING([if compiler accepts debug enabling flags $flags_dbg_yes])
+ fi
+ if test "$want_debug" = "no"; then
+ CFLAGS="$CFLAGS $flags_dbg_off"
+ AC_MSG_CHECKING([if compiler accepts debug disabling flags $flags_dbg_off])
+ fi
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+ ]],[[
+ int i = 1;
+ return i;
+ ]])
+ ],[
+ AC_MSG_RESULT([yes])
+ ],[
+ AC_MSG_RESULT([no])
+ honor_debug_option="no"
+ ])
+ #
+ if test "$honor_debug_option" = "no"; then
+ CFLAGS="$ac_save_CFLAGS"
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ fi
+ #
fi
+])
+
+
+dnl CARES_SET_COMPILER_OPTIMIZE_OPTS
+dnl -------------------------------------------------
+dnl Sets compiler specific options/flags which depend
+dnl on configure's optimize option.
+
+AC_DEFUN([CARES_SET_COMPILER_OPTIMIZE_OPTS], [
+ AC_REQUIRE([CARES_CHECK_OPTION_OPTIMIZE])dnl
+ AC_REQUIRE([CARES_CHECK_COMPILER])dnl
#
- if test "$want_debug" = "no"; then
- dnl strip off optimizer flags
- NEWFLAGS=""
- for flag in $CFLAGS; do
- case "$flag" in
- -O*)
- dnl echo "cut off $flag"
- ;;
- *)
- NEWFLAGS="$NEWFLAGS $flag"
- ;;
- esac
- done
- CFLAGS=$NEWFLAGS
+ if test "$compiler_id" != "unknown"; then
+ #
+ ac_save_CFLAGS="$CFLAGS"
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ #
+ dnl If optimization request setting has not been explicitly specified,
+ dnl it has been derived from the debug setting and initially assumed.
+ dnl This initially assumed optimizer setting will finally be ignored
+ dnl if CFLAGS or CPPFLAGS already hold optimizer flags. This implies
+ dnl that an initially assumed optimizer setting might not be honored.
+ #
+ honor_optimize_option="yes"
+ if test "$want_optimize" = "assume_no" ||
+ test "$want_optimize" = "assume_yes"; then
+ AC_MSG_CHECKING([if compiler optimizer assumed setting might be used])
+ CARES_VAR_MATCH_IFELSE([CFLAGS],[${flags_opt_all}],[
+ honor_optimize_option="no"
+ ])
+ CARES_VAR_MATCH_IFELSE([CPPFLAGS],[${flags_opt_all}],[
+ honor_optimize_option="no"
+ ])
+ AC_MSG_RESULT([$honor_optimize_option])
+ if test "$honor_optimize_option" = "yes"; then
+ if test "$want_optimize" = "assume_yes"; then
+ want_optimize="yes"
+ fi
+ if test "$want_optimize" = "assume_no"; then
+ want_optimize="no"
+ fi
+ fi
+ fi
+ #
+ if test "$honor_optimize_option" = "yes"; then
+ CARES_VAR_STRIP([CFLAGS],[${flags_opt_all}])
+ CARES_VAR_STRIP([CPPFLAGS],[${flags_opt_all}])
+ if test "$want_optimize" = "yes"; then
+ CFLAGS="$CFLAGS $flags_opt_yes"
+ AC_MSG_CHECKING([if compiler accepts optimizer enabling flags $flags_opt_yes])
+ fi
+ if test "$want_optimize" = "no"; then
+ CFLAGS="$CFLAGS $flags_opt_off"
+ AC_MSG_CHECKING([if compiler accepts optimizer disabling flags $flags_opt_off])
+ fi
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+ ]],[[
+ int i = 1;
+ return i;
+ ]])
+ ],[
+ AC_MSG_RESULT([yes])
+ ],[
+ AC_MSG_RESULT([no])
+ honor_optimize_option="no"
+ ])
+ fi
+ #
+ if test "$honor_optimize_option" = "no"; then
+ CFLAGS="$ac_save_CFLAGS"
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ fi
+ #
fi
- #
])
-dnl CARES_PROCESS_CC_WARNING_OPTS
+dnl CARES_SET_COMPILER_WARNING_OPTS
dnl -------------------------------------------------
dnl Sets compiler options/flags which depend on
dnl configure's warnings given option.
-AC_DEFUN([CARES_PROCESS_CC_WARNING_OPTS], [
+AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [
AC_REQUIRE([CARES_CHECK_OPTION_WARNINGS])dnl
AC_REQUIRE([CARES_CHECK_COMPILER])dnl
#
@@ -236,7 +400,7 @@ AC_DEFUN([CARES_PROCESS_CC_WARNING_OPTS], [
if test "$compiler_id" = "GNUC"; then
#
# FIXME: Some of these warnings should be changed into errors
- # and moved to CARES-PROCESS-CC-BASIC-OPTS
+ # and moved to CARES-SET-COMPILER-BASIC-OPTS
#
if test "$want_warnings" = "yes"; then
dnl this is a set of options we believe *ALL* gcc versions support:
@@ -295,6 +459,7 @@ dnl CARES_PROCESS_DEBUG_BUILD_OPTS
dnl -------------------------------------------------
dnl Settings which depend on configure's debug given
dnl option, and further configure the build process.
+dnl Don't use this macro for compiler dependant stuff.
AC_DEFUN([CARES_PROCESS_DEBUG_BUILD_OPTS], [
AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl
@@ -311,9 +476,86 @@ AC_DEFUN([CARES_PROCESS_DEBUG_BUILD_OPTS], [
dnl libcurl stuff so this BUILDING_LIBCURL is not THAT much uglier
AC_DEFINE(BUILDING_LIBCURL, 1, [when building as static part of libcurl])
- CPPFLAGS="$CPPFLAGS -DCURLDEBUG -I$srcdir/../include"
+ CPPFLAGS="$CPPFLAGS -DCURLDEBUG"
+
+ dnl CHECKME: Do we still need so specify this include path here?
+ CPPFLAGS="$CPPFLAGS -I$srcdir/../include"
+
fi
#
])
+dnl CARES_CHECK_PROG_CC
+dnl -------------------------------------------------
+dnl Check for compiler program, preventing CFLAGS and
+dnl CPPFLAGS from being unexpectedly changed.
+
+AC_DEFUN([CARES_CHECK_PROG_CC], [
+ ac_save_CFLAGS="$CFLAGS"
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ AC_PROG_CC
+ CFLAGS="$ac_save_CFLAGS"
+ CPPFLAGS="$ac_save_CPPFLAGS"
+])
+
+
+dnl CARES_VAR_MATCH (VARNAME, VALUE)
+dnl -------------------------------------------------
+dnl Verifies if shell variable VARNAME contains VALUE.
+dnl Contents of variable VARNAME and VALUE are handled
+dnl as whitespace separated lists of words. If at least
+dnl one word of VALUE is present in VARNAME the match
+dnl is considered positive, otherwise false.
+
+AC_DEFUN([CARES_VAR_MATCH], [
+ ac_var_match_word="no"
+ for word1 in "${[$1]}"; do
+ for word2 in "[$2]"; do
+ if test "$word1" = "$word2"; then
+ ac_var_match_word="yes"
+ fi
+ done
+ done
+])
+
+
+dnl CARES_VAR_MATCH_IFELSE (VARNAME, VALUE,
+dnl [ACTION-IF-MATCH], [ACTION-IF-NOT-MATCH])
+dnl -------------------------------------------------
+dnl This performs a CURL_VAR_MATCH check and executes
+dnl first branch if the match is positive, otherwise
+dnl the second branch is executed.
+
+AC_DEFUN([CARES_VAR_MATCH_IFELSE], [
+ CARES_VAR_MATCH([$1],[$2])
+ if test "$ac_var_match_word" = "yes"; then
+ ifelse($3,,:,[$3])
+ ifelse($4,,,[else
+ [$4]])
+ fi
+])
+
+
+dnl CARES_VAR_STRIP (VARNAME, VALUE)
+dnl -------------------------------------------------
+dnl Contents of variable VARNAME and VALUE are handled
+dnl as whitespace separated lists of words. Each word
+dnl from VALUE is removed from VARNAME when present.
+
+AC_DEFUN([CARES_VAR_STRIP], [
+ ac_var_stripped=""
+ for word1 in "${[$1]}"; do
+ ac_var_strip_word="no"
+ for word2 in "[$2]"; do
+ if test "$word1" = "$word2"; then
+ ac_var_strip_word="yes"
+ fi
+ done
+ if test "$ac_var_strip_word" = "no"; then
+ ac_var_stripped="$ac_var_stripped $word1"
+ fi
+ done
+ dnl squeeze whitespace out of result
+ [$1]=`eval echo $[$1]`
+])
diff --git a/ares/m4/cares-confopts.m4 b/ares/m4/cares-confopts.m4
index 2299b6074..17a6875f3 100644
--- a/ares/m4/cares-confopts.m4
+++ b/ares/m4/cares-confopts.m4
@@ -16,7 +16,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
-# serial 1
+# serial 2
dnl CARES_CHECK_OPTION_DEBUG
@@ -27,13 +27,13 @@ dnl variable want_debug value as appropriate.
AC_DEFUN([CARES_CHECK_OPTION_DEBUG], [
AC_BEFORE([$0],[CARES_CHECK_OPTION_WARNINGS])dnl
- AC_BEFORE([$0],[AC_PROG_CC])dnl
+ AC_BEFORE([$0],[CARES_CHECK_PROG_CC])dnl
AC_MSG_CHECKING([whether to enable debug build options])
OPT_DEBUG_BUILD="default"
AC_ARG_ENABLE(debug,
- AC_HELP_STRING([--enable-debug],[Enable debug build options])
- AC_HELP_STRING([--disable-debug],[Disable debug build options]),
- OPT_DEBUG_BUILD=$enableval)
+AC_HELP_STRING([--enable-debug],[Enable debug build options])
+AC_HELP_STRING([--disable-debug],[Disable debug build options]),
+ OPT_DEBUG_BUILD=$enableval)
case "$OPT_DEBUG_BUILD" in
no)
dnl --disable-debug option used
@@ -52,21 +52,77 @@ AC_DEFUN([CARES_CHECK_OPTION_DEBUG], [
])
+dnl CARES_CHECK_OPTION_OPTIMIZE
+dnl -------------------------------------------------
+dnl Verify if configure has been invoked with option
+dnl --enable-optimize or --disable-optimize, and set
+dnl shell variable want_optimize value as appropriate.
+
+AC_DEFUN([CARES_CHECK_OPTION_OPTIMIZE], [
+ AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl
+ AC_BEFORE([$0],[CARES_CHECK_PROG_CC])dnl
+ AC_MSG_CHECKING([whether to enable compiler optimizer])
+ OPT_COMPILER_OPTIMIZE="default"
+ AC_ARG_ENABLE(optimize,
+AC_HELP_STRING([--enable-optimize(=OPT)],[Enable compiler optimizations (default=-O2)])
+AC_HELP_STRING([--disable-optimize],[Disable compiler optimizations]),
+ OPT_COMPILER_OPTIMIZE=$enableval)
+ case "$OPT_COMPILER_OPTIMIZE" in
+ no)
+ dnl --disable-optimize option used. We will handle this as
+ dnl a request to disable compiler optimizations if possible.
+ dnl If the compiler is known CFLAGS and CPPFLAGS will be
+ dnl overridden, otherwise this can not be honored.
+ want_optimize="no"
+ AC_MSG_RESULT([no])
+ ;;
+ default)
+ dnl configure's optimize option not specified. Initially we will
+ dnl handle this as a a request contrary to configure's setting
+ dnl for --enable-debug. IOW, initially, for debug-enabled builds
+ dnl this will be handled as a request to disable optimizations if
+ dnl possible, and for debug-disabled builds this will be handled
+ dnl initially as a request to enable optimizations if possible.
+ dnl Finally, if the compiler is known and CFLAGS and CPPFLAGS do
+ dnl not have any optimizer flag the request will be honored, in
+ dnl any other case the request can not be honored.
+ dnl IOW, existing optimizer flags defined in CFLAGS or CPPFLAGS
+ dnl will always take precedence over any initial assumption.
+ if test "$want_debug" = "yes"; then
+ want_optimize="assume_no"
+ AC_MSG_RESULT([not specified (assuming no)])
+ else
+ want_optimize="assume_yes"
+ AC_MSG_RESULT([not specified (assuming yes)])
+ fi
+ ;;
+ *)
+ dnl --enable-optimize option used. We will handle this as
+ dnl a request to enable compiler optimizations if possible.
+ dnl If the compiler is known CFLAGS and CPPFLAGS will be
+ dnl overridden, otherwise this can not be honored.
+ want_optimize="yes"
+ AC_MSG_RESULT([yes])
+ ;;
+ esac
+])
+
+
dnl CARES_CHECK_OPTION_WARNINGS
dnl -------------------------------------------------
dnl Verify if configure has been invoked with option
dnl --enable-warnings or --disable-warnings, and set
-DNL shell variable want_warnings as appropriate.
+dnl shell variable want_warnings as appropriate.
AC_DEFUN([CARES_CHECK_OPTION_WARNINGS], [
AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl
- AC_BEFORE([$0],[AC_PROG_CC])dnl
+ AC_BEFORE([$0],[CARES_CHECK_PROG_CC])dnl
AC_MSG_CHECKING([whether to enable strict compiler warnings])
OPT_COMPILER_WARNINGS="default"
AC_ARG_ENABLE(warnings,
- AC_HELP_STRING([--enable-warnings],[Enable strict compiler warnings])
- AC_HELP_STRING([--disable-warnings],[Disable strict compiler warnings]),
- OPT_COMPILER_WARNINGS=$enableval)
+AC_HELP_STRING([--enable-warnings],[Enable strict compiler warnings])
+AC_HELP_STRING([--disable-warnings],[Disable strict compiler warnings]),
+ OPT_COMPILER_WARNINGS=$enableval)
case "$OPT_COMPILER_WARNINGS" in
no)
dnl --disable-warnings option used
diff --git a/configure.ac b/configure.ac
index 935ee46cb..bf86bf038 100644
--- a/configure.ac
+++ b/configure.ac
@@ -37,6 +37,7 @@ AM_CONFIG_HEADER(lib/config.h src/config.h include/curl/curlbuild.h)
AM_MAINTAINER_MODE
CURL_CHECK_OPTION_DEBUG
+CURL_CHECK_OPTION_OPTIMIZE
CURL_CHECK_OPTION_WARNINGS
dnl SED is mandatory for configure process and libtool.
@@ -133,7 +134,7 @@ dnl Get system canonical name
AC_DEFINE_UNQUOTED(OS, "${host}", [cpu-machine-OS])
dnl Checks for programs.
-AC_PROG_CC
+CURL_CHECK_PROG_CC
dnl Our curl_off_t internal and external configure settings
CURL_CONFIGURE_CURL_OFF_T
@@ -251,9 +252,10 @@ dnl platform/compiler/architecture specific checks/flags
dnl **********************************************************************
CURL_CHECK_COMPILER
-CURL_PROCESS_CC_BASIC_OPTS
-CURL_PROCESS_CC_DEBUG_OPTS
-CURL_PROCESS_CC_WARNING_OPTS
+CURL_SET_COMPILER_BASIC_OPTS
+CURL_SET_COMPILER_DEBUG_OPTS
+CURL_SET_COMPILER_OPTIMIZE_OPTS
+CURL_SET_COMPILER_WARNING_OPTS
case $host in
#
@@ -2529,6 +2531,18 @@ fi
AC_SUBST(SUPPORT_PROTOCOLS)
+dnl squeeze whitespace out of some variables
+
+CFLAGS=`eval echo $CFLAGS`
+CPPFLAGS=`eval echo $CPPFLAGS`
+DEFS=`eval echo $DEFS`
+LDFLAGS=`eval echo $LDFLAGS`
+LIBS=`eval echo $LIBS`
+
+CURL_LIBS=`eval echo $CURL_LIBS`
+LIBCURL_LIBS=`eval echo $LIBCURL_LIBS`
+TEST_SERVER_LIBS=`eval echo $TEST_SERVER_LIBS`
+
AC_CONFIG_FILES([Makefile \
docs/Makefile \
docs/examples/Makefile \
diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index a132ec28b..1cff5be01 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -22,7 +22,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
-# serial 1
+# serial 2
dnl CURL_CHECK_COMPILER
@@ -34,11 +34,33 @@ AC_DEFUN([CURL_CHECK_COMPILER], [
compiler_id="unknown"
compiler_num="0"
#
+ flags_dbg_all="unknown"
+ flags_dbg_yes="unknown"
+ flags_dbg_off="unknown"
+ flags_opt_all="unknown"
+ flags_opt_yes="unknown"
+ flags_opt_off="unknown"
+ #
CURL_CHECK_COMPILER_DEC
CURL_CHECK_COMPILER_IBM
CURL_CHECK_COMPILER_INTEL
CURL_CHECK_COMPILER_GNU
#
+ if test "$compiler_id" = "unknown"; then
+ cat <<_EOF 1>&2
+***
+*** Warning: This configure script does not have information about the
+*** compiler you are using, relative to the flags required to enable or
+*** disable generation of debug info, optimization options or warnings.
+***
+*** Whatever settings are present in CFLAGS will be used for this run.
+***
+*** If you wish to help the cURL project to better support your compiler
+*** you can report this and the required info on the libcurl development
+*** mailing list: http://cool.haxx.se/mailman/listinfo/curl-library/
+***
+_EOF
+ fi
])
@@ -54,6 +76,12 @@ AC_DEFUN([CURL_CHECK_COMPILER_DEC], [
test "$curl_cv_have_def___DECC_VER" = "yes"; then
AC_MSG_RESULT([yes])
compiler_id="DECC"
+ flags_dbg_all="-g -g0 -g1 -g2 -g3"
+ flags_dbg_yes="-g2"
+ flags_dbg_off="-g0"
+ flags_opt_all="-O -O0 -O1 -O2 -O3 -O4"
+ flags_opt_yes="-O1"
+ flags_opt_off="-O0"
else
AC_MSG_RESULT([no])
fi
@@ -77,6 +105,19 @@ AC_DEFUN([CURL_CHECK_COMPILER_GNU], [
gccvhi=`echo $gccver | cut -d . -f1`
gccvlo=`echo $gccver | cut -d . -f2`
compiler_num=`(expr $gccvhi "*" 100 + $gccvlo) 2>/dev/null`
+ flags_dbg_all="-g -g0 -g1 -g2 -g3"
+ flags_dbg_all="$flags_dbg_all -ggdb"
+ flags_dbg_all="$flags_dbg_all -gstabs"
+ flags_dbg_all="$flags_dbg_all -gstabs+"
+ flags_dbg_all="$flags_dbg_all -gcoff"
+ flags_dbg_all="$flags_dbg_all -gxcoff"
+ flags_dbg_all="$flags_dbg_all -gdwarf-2"
+ flags_dbg_all="$flags_dbg_all -gvms"
+ flags_dbg_yes="-g"
+ flags_dbg_off="-g0"
+ flags_opt_all="-O -O0 -O1 -O2 -O3 -Os"
+ flags_opt_yes="-O2"
+ flags_opt_off="-O0"
else
AC_MSG_RESULT([no])
fi
@@ -93,6 +134,19 @@ AC_DEFUN([CURL_CHECK_COMPILER_IBM], [
if test "$curl_cv_have_def___IBMC__" = "yes"; then
AC_MSG_RESULT([yes])
compiler_id="IBMC"
+ flags_dbg_all="-g -g0 -g1 -g2 -g3"
+ flags_dbg_yes="-g"
+ flags_dbg_off=""
+ flags_opt_all="-O -O0 -O1 -O2 -O3 -O4 -O5"
+ flags_opt_all="$flags_opt_all -qnooptimize"
+ flags_opt_all="$flags_opt_all -qoptimize=0"
+ flags_opt_all="$flags_opt_all -qoptimize=1"
+ flags_opt_all="$flags_opt_all -qoptimize=2"
+ flags_opt_all="$flags_opt_all -qoptimize=3"
+ flags_opt_all="$flags_opt_all -qoptimize=4"
+ flags_opt_all="$flags_opt_all -qoptimize=5"
+ flags_opt_yes="-O2"
+ flags_opt_off="-qnooptimize"
else
AC_MSG_RESULT([no])
fi
@@ -112,8 +166,27 @@ AC_DEFUN([CURL_CHECK_COMPILER_INTEL], [
CURL_CHECK_DEF([__unix__], [], [silent])
if test "$curl_cv_have_def___unix__" = "yes"; then
compiler_id="ICC_unix"
+ flags_dbg_all="-g -g0"
+ flags_dbg_yes="-g -fp"
+ flags_dbg_off="-g0"
+ flags_opt_all="-O -O0 -O1 -O2 -O3 -Os"
+ flags_opt_yes="-O2"
+ flags_opt_off="-O0"
else
compiler_id="ICC_windows"
+ flags_dbg_all="/ZI /Zi /zI /zi /ZD /Zd /zD /zd /Z7 /z7"
+ flags_dbg_all="$flags_dbg_all /debug"
+ flags_dbg_all="$flags_dbg_all /debug:none"
+ flags_dbg_all="$flags_dbg_all /debug:minimal"
+ flags_dbg_all="$flags_dbg_all /debug:partial"
+ flags_dbg_all="$flags_dbg_all /debug:full"
+ flags_dbg_all="$flags_dbg_all /debug:semantic_stepping"
+ flags_dbg_all="$flags_dbg_all /debug:extended"
+ flags_dbg_yes="/Zi /Oy-"
+ flags_dbg_off=""
+ flags_opt_all="/O /O0 /O1 /O2 /O3 /Os"
+ flags_opt_yes="/O2"
+ flags_opt_off=""
fi
compiler_num="$curl_cv_def___INTEL_COMPILER"
else
@@ -122,12 +195,13 @@ AC_DEFUN([CURL_CHECK_COMPILER_INTEL], [
])
-dnl CURL_PROCESS_CC_BASIC_OPTS
+dnl CURL_SET_COMPILER_BASIC_OPTS
dnl -------------------------------------------------
-dnl Sets compiler options/flags which are independant
-dnl of configure's debug or warnings options.
+dnl Sets compiler specific options/flags which do not
+dnl depend on configure's debug, optimize or warnings
+dnl options.
-AC_DEFUN([CURL_PROCESS_CC_BASIC_OPTS], [
+AC_DEFUN([CURL_SET_COMPILER_BASIC_OPTS], [
AC_REQUIRE([CURL_CHECK_COMPILER])dnl
#
if test "$compiler_id" = "DECC"; then
@@ -180,44 +254,134 @@ AC_DEFUN([CURL_PROCESS_CC_BASIC_OPTS], [
])
-dnl CURL_PROCESS_CC_DEBUG_OPTS
+dnl CURL_SET_COMPILER_DEBUG_OPTS
dnl -------------------------------------------------
-dnl Sets compiler options/flags which depend on
-dnl configure's debug given option.
+dnl Sets compiler specific options/flags which depend
+dnl on configure's debug option.
-AC_DEFUN([CURL_PROCESS_CC_DEBUG_OPTS], [
+AC_DEFUN([CURL_SET_COMPILER_DEBUG_OPTS], [
AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl
AC_REQUIRE([CURL_CHECK_COMPILER])dnl
#
- if test "$want_debug" = "yes"; then
- CFLAGS="$CFLAGS -g"
+ if test "$compiler_id" != "unknown"; then
+ #
+ ac_save_CFLAGS="$CFLAGS"
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ #
+ honor_debug_option="yes"
+ CURL_VAR_STRIP([CFLAGS],[${flags_dbg_all}])
+ CURL_VAR_STRIP([CPPFLAGS],[${flags_dbg_all}])
+ if test "$want_debug" = "yes"; then
+ CFLAGS="$CFLAGS $flags_dbg_yes"
+ AC_MSG_CHECKING([if compiler accepts debug enabling flags $flags_dbg_yes])
+ fi
+ if test "$want_debug" = "no"; then
+ CFLAGS="$CFLAGS $flags_dbg_off"
+ AC_MSG_CHECKING([if compiler accepts debug disabling flags $flags_dbg_off])
+ fi
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+ ]],[[
+ int i = 1;
+ return i;
+ ]])
+ ],[
+ AC_MSG_RESULT([yes])
+ ],[
+ AC_MSG_RESULT([no])
+ honor_debug_option="no"
+ ])
+ #
+ if test "$honor_debug_option" = "no"; then
+ CFLAGS="$ac_save_CFLAGS"
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ fi
+ #
fi
+])
+
+
+dnl CURL_SET_COMPILER_OPTIMIZE_OPTS
+dnl -------------------------------------------------
+dnl Sets compiler specific options/flags which depend
+dnl on configure's optimize option.
+
+AC_DEFUN([CURL_SET_COMPILER_OPTIMIZE_OPTS], [
+ AC_REQUIRE([CURL_CHECK_OPTION_OPTIMIZE])dnl
+ AC_REQUIRE([CURL_CHECK_COMPILER])dnl
#
- if test "$want_debug" = "no"; then
- dnl strip off optimizer flags
- NEWFLAGS=""
- for flag in $CFLAGS; do
- case "$flag" in
- -O*)
- dnl echo "cut off $flag"
- ;;
- *)
- NEWFLAGS="$NEWFLAGS $flag"
- ;;
- esac
- done
- CFLAGS=$NEWFLAGS
+ if test "$compiler_id" != "unknown"; then
+ #
+ ac_save_CFLAGS="$CFLAGS"
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ #
+ dnl If optimization request setting has not been explicitly specified,
+ dnl it has been derived from the debug setting and initially assumed.
+ dnl This initially assumed optimizer setting will finally be ignored
+ dnl if CFLAGS or CPPFLAGS already hold optimizer flags. This implies
+ dnl that an initially assumed optimizer setting might not be honored.
+ #
+ honor_optimize_option="yes"
+ if test "$want_optimize" = "assume_no" ||
+ test "$want_optimize" = "assume_yes"; then
+ AC_MSG_CHECKING([if compiler optimizer assumed setting might be used])
+ CURL_VAR_MATCH_IFELSE([CFLAGS],[${flags_opt_all}],[
+ honor_optimize_option="no"
+ ])
+ CURL_VAR_MATCH_IFELSE([CPPFLAGS],[${flags_opt_all}],[
+ honor_optimize_option="no"
+ ])
+ AC_MSG_RESULT([$honor_optimize_option])
+ if test "$honor_optimize_option" = "yes"; then
+ if test "$want_optimize" = "assume_yes"; then
+ want_optimize="yes"
+ fi
+ if test "$want_optimize" = "assume_no"; then
+ want_optimize="no"
+ fi
+ fi
+ fi
+ #
+ if test "$honor_optimize_option" = "yes"; then
+ CURL_VAR_STRIP([CFLAGS],[${flags_opt_all}])
+ CURL_VAR_STRIP([CPPFLAGS],[${flags_opt_all}])
+ if test "$want_optimize" = "yes"; then
+ CFLAGS="$CFLAGS $flags_opt_yes"
+ AC_MSG_CHECKING([if compiler accepts optimizer enabling flags $flags_opt_yes])
+ fi
+ if test "$want_optimize" = "no"; then
+ CFLAGS="$CFLAGS $flags_opt_off"
+ AC_MSG_CHECKING([if compiler accepts optimizer disabling flags $flags_opt_off])
+ fi
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+ ]],[[
+ int i = 1;
+ return i;
+ ]])
+ ],[
+ AC_MSG_RESULT([yes])
+ ],[
+ AC_MSG_RESULT([no])
+ honor_optimize_option="no"
+ ])
+ fi
+ #
+ if test "$honor_optimize_option" = "no"; then
+ CFLAGS="$ac_save_CFLAGS"
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ fi
+ #
fi
- #
])
-dnl CURL_PROCESS_CC_WARNING_OPTS
+dnl CURL_SET_COMPILER_WARNING_OPTS
dnl -------------------------------------------------
dnl Sets compiler options/flags which depend on
dnl configure's warnings given option.
-AC_DEFUN([CURL_PROCESS_CC_WARNING_OPTS], [
+AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
AC_REQUIRE([CURL_CHECK_OPTION_WARNINGS])dnl
AC_REQUIRE([CURL_CHECK_COMPILER])dnl
#
@@ -242,7 +406,7 @@ AC_DEFUN([CURL_PROCESS_CC_WARNING_OPTS], [
if test "$compiler_id" = "GNUC"; then
#
# FIXME: Some of these warnings should be changed into errors
- # and moved to CURL-PROCESS-CC-BASIC-OPTS
+ # and moved to CURL-SET-COMPILER-BASIC-OPTS
#
if test "$want_warnings" = "yes"; then
dnl this is a set of options we believe *ALL* gcc versions support:
@@ -301,6 +465,7 @@ dnl CURL_PROCESS_DEBUG_BUILD_OPTS
dnl -------------------------------------------------
dnl Settings which depend on configure's debug given
dnl option, and further configure the build process.
+dnl Don't use this macro for compiler dependant stuff.
AC_DEFUN([CURL_PROCESS_DEBUG_BUILD_OPTS], [
AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl
@@ -313,4 +478,76 @@ AC_DEFUN([CURL_PROCESS_DEBUG_BUILD_OPTS], [
])
+dnl CURL_CHECK_PROG_CC
+dnl -------------------------------------------------
+dnl Check for compiler program, preventing CFLAGS and
+dnl CPPFLAGS from being unexpectedly changed.
+
+AC_DEFUN([CURL_CHECK_PROG_CC], [
+ ac_save_CFLAGS="$CFLAGS"
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ AC_PROG_CC
+ CFLAGS="$ac_save_CFLAGS"
+ CPPFLAGS="$ac_save_CPPFLAGS"
+])
+
+
+dnl CURL_VAR_MATCH (VARNAME, VALUE)
+dnl -------------------------------------------------
+dnl Verifies if shell variable VARNAME contains VALUE.
+dnl Contents of variable VARNAME and VALUE are handled
+dnl as whitespace separated lists of words. If at least
+dnl one word of VALUE is present in VARNAME the match
+dnl is considered positive, otherwise false.
+
+AC_DEFUN([CURL_VAR_MATCH], [
+ ac_var_match_word="no"
+ for word1 in "${[$1]}"; do
+ for word2 in "[$2]"; do
+ if test "$word1" = "$word2"; then
+ ac_var_match_word="yes"
+ fi
+ done
+ done
+])
+
+dnl CURL_VAR_MATCH_IFELSE (VARNAME, VALUE,
+dnl [ACTION-IF-MATCH], [ACTION-IF-NOT-MATCH])
+dnl -------------------------------------------------
+dnl This performs a CURL_VAR_MATCH check and executes
+dnl first branch if the match is positive, otherwise
+dnl the second branch is executed.
+
+AC_DEFUN([CURL_VAR_MATCH_IFELSE], [
+ CURL_VAR_MATCH([$1],[$2])
+ if test "$ac_var_match_word" = "yes"; then
+ ifelse($3,,:,[$3])
+ ifelse($4,,,[else
+ [$4]])
+ fi
+])
+
+
+dnl CURL_VAR_STRIP (VARNAME, VALUE)
+dnl -------------------------------------------------
+dnl Contents of variable VARNAME and VALUE are handled
+dnl as whitespace separated lists of words. Each word
+dnl from VALUE is removed from VARNAME when present.
+
+AC_DEFUN([CURL_VAR_STRIP], [
+ ac_var_stripped=""
+ for word1 in "${[$1]}"; do
+ ac_var_strip_word="no"
+ for word2 in "[$2]"; do
+ if test "$word1" = "$word2"; then
+ ac_var_strip_word="yes"
+ fi
+ done
+ if test "$ac_var_strip_word" = "no"; then
+ ac_var_stripped="$ac_var_stripped $word1"
+ fi
+ done
+ dnl squeeze whitespace out of result
+ [$1]=`eval echo $[$1]`
+])
diff --git a/m4/curl-confopts.m4 b/m4/curl-confopts.m4
index 0c125d9c3..b0c1f3cd4 100644
--- a/m4/curl-confopts.m4
+++ b/m4/curl-confopts.m4
@@ -22,7 +22,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
-# serial 2
+# serial 3
dnl CURL_CHECK_OPTION_DEBUG
@@ -33,13 +33,13 @@ dnl variable want_debug value as appropriate.
AC_DEFUN([CURL_CHECK_OPTION_DEBUG], [
AC_BEFORE([$0],[CURL_CHECK_OPTION_WARNINGS])dnl
- AC_BEFORE([$0],[AC_PROG_CC])dnl
+ AC_BEFORE([$0],[CURL_CHECK_PROG_CC])dnl
AC_MSG_CHECKING([whether to enable debug build options])
OPT_DEBUG_BUILD="default"
AC_ARG_ENABLE(debug,
- AC_HELP_STRING([--enable-debug],[Enable debug build options])
- AC_HELP_STRING([--disable-debug],[Disable debug build options]),
- OPT_DEBUG_BUILD=$enableval)
+AC_HELP_STRING([--enable-debug],[Enable debug build options])
+AC_HELP_STRING([--disable-debug],[Disable debug build options]),
+ OPT_DEBUG_BUILD=$enableval)
case "$OPT_DEBUG_BUILD" in
no)
dnl --disable-debug option used
@@ -58,21 +58,77 @@ AC_DEFUN([CURL_CHECK_OPTION_DEBUG], [
])
+dnl CURL_CHECK_OPTION_OPTIMIZE
+dnl -------------------------------------------------
+dnl Verify if configure has been invoked with option
+dnl --enable-optimize or --disable-optimize, and set
+dnl shell variable want_optimize value as appropriate.
+
+AC_DEFUN([CURL_CHECK_OPTION_OPTIMIZE], [
+ AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl
+ AC_BEFORE([$0],[CURL_CHECK_PROG_CC])dnl
+ AC_MSG_CHECKING([whether to enable compiler optimizer])
+ OPT_COMPILER_OPTIMIZE="default"
+ AC_ARG_ENABLE(optimize,
+AC_HELP_STRING([--enable-optimize],[Enable compiler optimizations])
+AC_HELP_STRING([--disable-optimize],[Disable compiler optimizations]),
+ OPT_COMPILER_OPTIMIZE=$enableval)
+ case "$OPT_COMPILER_OPTIMIZE" in
+ no)
+ dnl --disable-optimize option used. We will handle this as
+ dnl a request to disable compiler optimizations if possible.
+ dnl If the compiler is known CFLAGS and CPPFLAGS will be
+ dnl overridden, otherwise this can not be honored.
+ want_optimize="no"
+ AC_MSG_RESULT([no])
+ ;;
+ default)
+ dnl configure's optimize option not specified. Initially we will
+ dnl handle this as a a request contrary to configure's setting
+ dnl for --enable-debug. IOW, initially, for debug-enabled builds
+ dnl this will be handled as a request to disable optimizations if
+ dnl possible, and for debug-disabled builds this will be handled
+ dnl initially as a request to enable optimizations if possible.
+ dnl Finally, if the compiler is known and CFLAGS and CPPFLAGS do
+ dnl not have any optimizer flag the request will be honored, in
+ dnl any other case the request can not be honored.
+ dnl IOW, existing optimizer flags defined in CFLAGS or CPPFLAGS
+ dnl will always take precedence over any initial assumption.
+ if test "$want_debug" = "yes"; then
+ want_optimize="assume_no"
+ AC_MSG_RESULT([not specified (assuming no)])
+ else
+ want_optimize="assume_yes"
+ AC_MSG_RESULT([not specified (assuming yes)])
+ fi
+ ;;
+ *)
+ dnl --enable-optimize option used. We will handle this as
+ dnl a request to enable compiler optimizations if possible.
+ dnl If the compiler is known CFLAGS and CPPFLAGS will be
+ dnl overridden, otherwise this can not be honored.
+ want_optimize="yes"
+ AC_MSG_RESULT([yes])
+ ;;
+ esac
+])
+
+
dnl CURL_CHECK_OPTION_WARNINGS
dnl -------------------------------------------------
dnl Verify if configure has been invoked with option
dnl --enable-warnings or --disable-warnings, and set
-DNL shell variable want_warnings as appropriate.
+dnl shell variable want_warnings as appropriate.
AC_DEFUN([CURL_CHECK_OPTION_WARNINGS], [
AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl
- AC_BEFORE([$0],[AC_PROG_CC])dnl
+ AC_BEFORE([$0],[CURL_CHECK_PROG_CC])dnl
AC_MSG_CHECKING([whether to enable strict compiler warnings])
OPT_COMPILER_WARNINGS="default"
AC_ARG_ENABLE(warnings,
- AC_HELP_STRING([--enable-warnings],[Enable strict compiler warnings])
- AC_HELP_STRING([--disable-warnings],[Disable strict compiler warnings]),
- OPT_COMPILER_WARNINGS=$enableval)
+AC_HELP_STRING([--enable-warnings],[Enable strict compiler warnings])
+AC_HELP_STRING([--disable-warnings],[Disable strict compiler warnings]),
+ OPT_COMPILER_WARNINGS=$enableval)
case "$OPT_COMPILER_WARNINGS" in
no)
dnl --disable-warnings option used
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 07:40:13 +0000