diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/zz40-xc-ovr.m4 | 384 |
1 files changed, 384 insertions, 0 deletions
diff --git a/m4/zz40-xc-ovr.m4 b/m4/zz40-xc-ovr.m4 new file mode 100644 index 000000000..9395e9a48 --- /dev/null +++ b/m4/zz40-xc-ovr.m4 @@ -0,0 +1,384 @@ +#--------------------------------------------------------------------------- +# +# zz40-xc-ovr.m4 +# +# Copyright (c) 2013 Daniel Stenberg <daniel@haxx.se> +# +# Permission to use, copy, modify, and distribute this software for any +# purpose with or without fee is hereby granted, provided that the above +# copyright notice and this permission notice appear in all copies. +# +# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +# +#--------------------------------------------------------------------------- + +# serial 1 + + +dnl The funny name of this file is intentional in order to make it +dnl sort alphabetically after any libtool, autoconf or automake +dnl provided .m4 macro file that might get copied into this same +dnl subdirectory. This allows that macro (re)definitions from this +dnl file may override those provided in other files. + + +dnl _XC_CONFIGURE_PREAMBLE_COMMENT +dnl ------------------------------------------------- +dnl Private macro. + +AC_DEFUN([_XC_CONFIGURE_PREAMBLE_COMMENT], +[ +## ---------------------------- ## +## XC_CONFIGURE_PREAMBLE rev: 1 ## +## ---------------------------- ## +]) + + +dnl _XC_CHECK_COMMAND_TEST +dnl ------------------------------------------------- +dnl Private macro. +dnl +dnl Check that 'test' command is available, else abort. + +AC_DEFUN([_XC_CHECK_COMMAND_TEST], +[dnl +# +# Require that 'test' command is available. +# + +xc_tst_str='unknown' +test -n "$xc_tst_str" && xc_tst_str='success' +case "x$xc_tst_str" in + xsuccess) + : + ;; + *) + echo "configure: error: 'test' command not found. Can not continue." + exit 1 + ;; +esac +]) + + +dnl _XC_CHECK_PATH +dnl ------------------------------------------------- +dnl Private macro. +dnl +dnl Check that PATH is set, otherwise abort. + +AC_DEFUN([_XC_CHECK_PATH], +[dnl +AC_REQUIRE([_XC_CHECK_COMMAND_TEST])dnl +# +# Require that PATH variable is set. +# + +xc_tst_str='unknown' +test -n "$PATH" && xc_tst_str='success' +case "x$xc_tst_str" in + xsuccess) + : + ;; + *) + echo "configure: error: PATH variable not set. Can not continue." + exit 1 + ;; +esac +]) + + +dnl _XC_CHECK_COMMAND_EXPR +dnl ------------------------------------------------- +dnl Private macro. +dnl +dnl Check that 'expr' command is available, else abort. + +AC_DEFUN([_XC_CHECK_COMMAND_EXPR], +[dnl +# +# Require that 'expr' command is available. +# + +xc_tst_str='unknown' +xc_tst_str=`expr "$xc_tst_str" : '.*'` +case "x$xc_tst_str" in + x7) + : + ;; + *) + echo "configure: error: 'expr' command not found. Can not continue." + exit 1 + ;; +esac +]) + + +dnl _XC_CHECK_UTILITY_SED +dnl ------------------------------------------------- +dnl Private macro. +dnl +dnl Check that 'sed' utility is found within PATH. This +dnl 'sed' is required in order to allow configure script +dnl bootstrapping itself. No fancy testing for a proper +dnl 'sed' this early please, that should be done later. + +AC_DEFUN([_XC_CHECK_UTILITY_SED], +[dnl +# +# Require that 'sed' utility is found within PATH. +# + +xc_tst_str='unknown' +xc_tst_str=`echo "$xc_tst_str" | sed -e 's:unknown:success:'` +case "x$xc_tst_str" in + xsuccess) + : + ;; + *) + echo "configure: error: 'sed' utility not in PATH. Can not continue." + exit 1 + ;; +esac +]) + + +dnl _XC_CHECK_UTILITY_GREP +dnl ------------------------------------------------- +dnl Private macro. +dnl +dnl Check that 'grep' utility is found within PATH. This +dnl 'grep' is required in order to allow configure script +dnl bootstrapping itself. No fancy testing for a proper +dnl 'grep' this early please, that should be done later. + +AC_DEFUN([_XC_CHECK_UTILITY_GREP], +[dnl +# +# Require that 'grep' utility is found within PATH. +# + +xc_tst_str='unknown' +echo "$xc_tst_str" | grep 'unknown' >/dev/null 2>&1 && xc_tst_str='success' +case "x$xc_tst_str" in + xsuccess) + : + ;; + *) + echo "configure: error: 'grep' utility not in PATH. Can not continue." + exit 1 + ;; +esac +]) + + +dnl _XC_CHECK_PATH_SEPARATOR +dnl ------------------------------------------------- +dnl Private macro. +dnl +dnl Check and compute the path separator for us. This +dnl path separator is the symbol used to diferentiate +dnl or separate paths inside the PATH environment var. +dnl +dnl User provided PATH_SEPARATOR always overrides the +dnl auto-detected one. + +AC_DEFUN([_XC_CHECK_PATH_SEPARATOR], +[dnl +AC_REQUIRE([_XC_CHECK_COMMAND_TEST])dnl +AC_REQUIRE([_XC_CHECK_PATH])dnl +AC_REQUIRE([_XC_CHECK_COMMAND_EXPR])dnl +# +# Auto-detect and set PATH_SEPARATOR, unless it is already set. +# + +# Directory count in PATH when using a colon separator. +xc_tst_dirs_col=0 +xc_tst_prev_IFS=$IFS; IFS=':' +for xc_tst_dir in $PATH; do + IFS=$xc_tst_prev_IFS + test -d "$xc_tst_dir" && xc_tst_dirs_col=`expr $xc_tst_dirs_col + 1` +done +IFS=$xc_tst_prev_IFS + +# Directory count in PATH when using a semicolon separator. +xc_tst_dirs_sem=0 +xc_tst_prev_IFS=$IFS; IFS=';' +for xc_tst_dir in $PATH; do + IFS=$xc_tst_prev_IFS + test -d "$xc_tst_dir" && xc_tst_dirs_sem=`expr $xc_tst_dirs_sem + 1` +done +IFS=$xc_tst_prev_IFS + +if test $xc_tst_dirs_sem -eq $xc_tst_dirs_col; then + # When both counting methods give the same result we do not want to + # chose one over the other, and consider auto-detection not possible. + if test -z "$PATH_SEPARATOR"; then + # Stop dead until user provides PATH_SEPARATOR definition. + echo "configure: error: PATH_SEPARATOR variable not set. Can not continue." + exit 1 + fi +else + # Separator with the greater directory count is the auto-detected one. + if test $xc_tst_dirs_sem -gt $xc_tst_dirs_col; then + xc_tst_auto_separator=';' + else + xc_tst_auto_separator=':' + fi + if test -z "$PATH_SEPARATOR"; then + # Simply use the auto-detected one when not already set. + PATH_SEPARATOR="$xc_tst_auto_separator" + elif "x$PATH_SEPARATOR" != "x$xc_tst_auto_separator"; then + echo "configure: warning: PATH_SEPARATOR does not match auto-detected one." + fi +fi +AC_SUBST([PATH_SEPARATOR])dnl +]) + + +dnl _XC_CONFIGURE_PREAMBLE +dnl ------------------------------------------------- +dnl Private macro. + +AC_DEFUN([_XC_CONFIGURE_PREAMBLE], +[dnl +AC_REQUIRE([_XC_CONFIGURE_PREAMBLE_COMMENT])dnl +AC_REQUIRE([_XC_CHECK_COMMAND_TEST])dnl +AC_REQUIRE([_XC_CHECK_PATH])dnl +AC_REQUIRE([_XC_CHECK_COMMAND_EXPR])dnl +AC_REQUIRE([_XC_CHECK_UTILITY_SED])dnl +AC_REQUIRE([_XC_CHECK_UTILITY_GREP])dnl +AC_REQUIRE([_XC_CHECK_PATH_SEPARATOR])dnl +echo "checking whether some basic commands and utilities are available... yes" +]) + + +dnl XC_CONFIGURE_PREAMBLE +dnl ------------------------------------------------- +dnl Public macro. +dnl +dnl This macro macro emits shell code which does some +dnl very basic checks related with the availability +dnl of some commands and utilities needed to allow +dnl configure script bootstrapping itself when using +dnl these to figure out other settings. Also performs +dnl PATH_SEPARATOR auto-detection and sets its value +dnl unless it is already set. +dnl +dnl These basic checks are intended to be placed and +dnl executed as early as possible in the resulting +dnl configure script, and as such these must be pure +dnl shell code. +dnl +dnl Although this is a public macro it should not be +dnl used directly from configure.ac given that in this +dnl way its expansion is not placed early enough in +dnl generated configure script, it simply makes little +dnl sense to perform these basic checks once the script +dnl is into more serious business. +dnl +dnl The proper way of making this macro expand early +dnl enough in configure script is using XC_OVR_ZZ40 +dnl in configure.ac which takes care of everything. + +AC_DEFUN([XC_CONFIGURE_PREAMBLE], +[dnl +AC_PREREQ([2.50])dnl +AC_BEFORE([$0],[_XC_CONFIGURE_PREAMBLE])dnl +AC_BEFORE([$0],[_XC_CHECK_COMMAND_TEST])dnl +AC_BEFORE([$0],[_XC_CHECK_PATH])dnl +AC_BEFORE([$0],[_XC_CHECK_COMMAND_EXPR])dnl +AC_BEFORE([$0],[_XC_CHECK_UTILITY_SED])dnl +AC_BEFORE([$0],[_XC_CHECK_UTILITY_GREP])dnl +AC_BEFORE([$0],[_XC_CHECK_PATH_SEPARATOR])dnl +AC_REQUIRE([_XC_CONFIGURE_PREAMBLE])dnl +m4_define([$0],[])dnl +]) + + +dnl Override autoconf's PATH_SEPARATOR check +dnl ------------------------------------------------- +dnl This is done to ensure that the same check is +dnl used across different autoconf versions and to +dnl allow us to expand XC_CONFIGURE_PREAMBLE macro +dnl early enough in the generated configure script. + +dnl +dnl Override when using autoconf 2.53 and newer. +dnl + +m4_defun([_AS_PATH_SEPARATOR_PREPARE], +[dnl +AC_REQUIRE([XC_CONFIGURE_PREAMBLE])dnl +m4_define([$0],[])dnl +]) + +dnl +dnl Override when using autoconf 2.50 to 2.52 +dnl + +m4_defun([_AC_INIT_PREPARE_FS_SEPARATORS], +[dnl +AC_REQUIRE([XC_CONFIGURE_PREAMBLE])dnl +ac_path_separator=$PATH_SEPARATOR +m4_define([$0],[])dnl +]) + +dnl +dnl Override when using libtool 1.4.2 +dnl + +m4_defun([_LT_AC_LIBTOOL_SYS_PATH_SEPARATOR], +[dnl +AC_REQUIRE([XC_CONFIGURE_PREAMBLE])dnl +lt_cv_sys_path_separator=$PATH_SEPARATOR +m4_define([$0],[])dnl +]) + + +dnl XC_OVR_ZZ40 +dnl ------------------------------------------------- +dnl Placing a call to this macro in configure.ac will +dnl make macros in this file visible to other macros +dnl used for same configure script, overriding those +dnl provided elsewhere. +dnl +dnl This is the proper and intended way in which macro +dnl XC_CONFIGURE_PREAMBLE will expand early enough in +dnl generated configure script. + +AC_DEFUN([XC_OVR_ZZ40], +[dnl +AC_BEFORE([$0],[AC_CHECK_TOOL])dnl +AC_BEFORE([$0],[AC_CHECK_PROG])dnl +AC_BEFORE([$0],[AC_CHECK_TOOLS])dnl +AC_BEFORE([$0],[AC_CHECK_PROGS])dnl +dnl +AC_BEFORE([$0],[AC_PATH_TOOL])dnl +AC_BEFORE([$0],[AC_PATH_PROG])dnl +AC_BEFORE([$0],[AC_PATH_PROGS])dnl +dnl +AC_BEFORE([$0],[AC_PROG_SED])dnl +AC_BEFORE([$0],[AC_PROG_GREP])dnl +AC_BEFORE([$0],[AC_PROG_LN_S])dnl +AC_BEFORE([$0],[AC_PROG_INSTALL])dnl +AC_BEFORE([$0],[AC_PROG_MAKE_SET])dnl +AC_BEFORE([$0],[AC_PROG_LIBTOOL])dnl +dnl +AC_BEFORE([$0],[LT_INIT])dnl +AC_BEFORE([$0],[AM_INIT_AUTOMAKE])dnl +AC_BEFORE([$0],[AC_LIBTOOL_WIN32_DLL])dnl +dnl +AC_BEFORE([$0],[AC_CONFIG_SRCDIR])dnl +AC_BEFORE([$0],[AC_CONFIG_HEADERS])dnl +AC_BEFORE([$0],[AC_CONFIG_MACRO_DIR])dnl +AC_BEFORE([$0],[AC_CONFIG_MACRO_DIRS])dnl +dnl +m4_define([$0],[])dnl +]) + |