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Diffstat (limited to 'ares/acinclude.m4')
-rw-r--r-- | ares/acinclude.m4 | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/ares/acinclude.m4 b/ares/acinclude.m4 new file mode 100644 index 000000000..76ff0deef --- /dev/null +++ b/ares/acinclude.m4 @@ -0,0 +1,100 @@ + +dnl We create a function for detecting which compiler we use and then set as +dnl pendantic compiler options as possible for that particular compiler. The +dnl options are only used for debug-builds. + +dnl This is a copy of the original found in curl's configure script. Don't +dnl modify this one, edit the one in curl and copy it back here when that one +dnl is changed. + +AC_DEFUN([CURL_CC_DEBUG_OPTS], +[ + if test "$GCC" = "yes"; then + + dnl figure out gcc version! + AC_MSG_CHECKING([gcc version]) + gccver=`$CC -dumpversion` + num1=`echo $gccver | cut -d . -f1` + num2=`echo $gccver | cut -d . -f2` + gccnum=`(expr $num1 "*" 100 + $num2) 2>/dev/null` + AC_MSG_RESULT($gccver) + + AC_MSG_CHECKING([if this is icc in disguise]) + AC_EGREP_CPP([^__ICC], [__ICC], + dnl action if the text is found, this it has not been replaced by the + dnl cpp + [ICC="no"] + AC_MSG_RESULT([no]), + dnl the text was not found, it was replaced by the cpp + [ICC="yes"] + AC_MSG_RESULT([yes]) + ) + + if test "$ICC" = "yes"; then + dnl this is icc, not gcc. + + dnl Warning 279 warns on static conditions in while expressions, + dnl ignore that. + + WARN="-wd279" + + if test "$gccnum" -gt "600"; then + dnl icc 6.0 and older doesn't have the -Wall flag, although it does + dnl have -wd<n> + WARN="-Wall $WARN" + fi + else dnl $ICC = yes + dnl + WARN="-W -Wall -Wwrite-strings -pedantic -Wno-long-long -Wundef -Wpointer-arith -Wnested-externs -Winline -Wmissing-declarations -Wmissing-prototypes -Wsign-compare" + + dnl -Wcast-align is a bit too annoying ;-) + + if test "$gccnum" -ge "296"; then + dnl gcc 2.96 or later + WARN="$WARN -Wfloat-equal" + + if test "$gccnum" -gt "296"; then + dnl this option does not exist in 2.96 + WARN="$WARN -Wno-format-nonliteral" + fi + + dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on + dnl on i686-Linux as it gives us heaps with false positives + if test "$gccnum" -ge "303"; then + dnl gcc 3.3 and later + WARN="$WARN -Wendif-labels -Wstrict-prototypes" + fi + fi + + for flag in $CPPFLAGS; do + case "$flag" in + -I*) + dnl include path + add=`echo $flag | sed 's/^-I/-isystem /g'` + WARN="$WARN $add" + ;; + esac + done + + fi dnl $ICC = no + + CFLAGS="$CFLAGS $WARN" + + fi dnl $GCC = yes + + 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 + +]) dnl end of AC_DEFUN() + |