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author | Yang Tse <yangsita@gmail.com> | 2008-09-30 12:39:54 +0000 |
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committer | Yang Tse <yangsita@gmail.com> | 2008-09-30 12:39:54 +0000 |
commit | 2823a5380fdf4b5608b4c8ebfa25d24966e5ff66 (patch) | |
tree | 43e4244b78c2d8ee872632bf956864119d86c6fc /configure.ac | |
parent | 2bc4f4c175bf113ff4d39713bd98ca6774e767cd (diff) | |
download | c-ares-2823a5380fdf4b5608b4c8ebfa25d24966e5ff66.tar.gz c-ares-2823a5380fdf4b5608b4c8ebfa25d24966e5ff66.tar.bz2 c-ares-2823a5380fdf4b5608b4c8ebfa25d24966e5ff66.zip |
now compiler warnings are activated for all gcc builds, not only debug ones.
Diffstat (limited to 'configure.ac')
-rw-r--r-- | configure.ac | 56 |
1 files changed, 49 insertions, 7 deletions
diff --git a/configure.ac b/configure.ac index 9a1f1a3..59c1cdb 100644 --- a/configure.ac +++ b/configure.ac @@ -140,10 +140,10 @@ m4_defun([AC_LIBTOOL_CXXCPP],[true]) m4_ifdef([AC_LIBTOOL_F77], [m4_undefine([AC_LIBTOOL_F77])]) m4_defun([AC_LIBTOOL_F77],[]) -dnl force libtool to build static libraries with PIC on AMD64-linux -AC_MSG_CHECKING([if arch-OS host is AMD64-linux (to build static libraries with PIC)]) +dnl force libtool to build static libraries with PIC on AMD64-Linux & FreeBSD +AC_MSG_CHECKING([if arch-OS host is AMD64-Linux/FreeBSD (to build static libraries with PIC)]) case $host in - x86_64*linux*) + x86_64*linux*|amd64*freebsd*|ia64*freebsd*) AC_MSG_RESULT([yes]) with_pic=yes ;; @@ -198,9 +198,7 @@ CURL_CHECK_DEF([__INTEL_COMPILER], [], [silent]) if test "$curl_cv_have_def___INTEL_COMPILER" = "yes"; then AC_MSG_RESULT([yes]) ac_cv_compiler="ICC" - AC_MSG_CHECKING([compiler version]) ac_cv_compiler_num="$curl_cv_def___INTEL_COMPILER" - AC_MSG_RESULT([$ac_cv_compiler_num]) dnl On unix this compiler uses gcc's header files, so dnl we select ANSI C89 dialect plus GNU extensions. CPPFLAGS="$CPPFLAGS -std=gnu89" @@ -259,13 +257,57 @@ if test "$curl_cv_have_def___GNUC__" = "yes" && test "$ac_cv_compiler" = "unknown"; then AC_MSG_RESULT([yes]) ac_cv_compiler="GNUC" - AC_MSG_CHECKING([compiler version]) gccver=`$CC -dumpversion` gccvhi=`echo $gccver | cut -d . -f1` gccvlo=`echo $gccver | cut -d . -f2` gccnum=`(expr $gccvhi "*" 100 + $gccvlo) 2>/dev/null` ac_cv_compiler_num="$gccnum" - AC_MSG_RESULT([$ac_cv_compiler_num]) + dnl this is a set of options we believe *ALL* gcc versions support: + WARN="-W -Wall -Wwrite-strings -pedantic -Wpointer-arith -Wnested-externs -Winline -Wmissing-prototypes" + dnl -Wcast-align is a bit too annoying on all gcc versions ;-) + if test "$ac_cv_compiler_num" -ge "207"; then + dnl gcc 2.7 or later + WARN="$WARN -Wmissing-declarations" + fi + if test "$ac_cv_compiler_num" -gt "295"; then + dnl only if the compiler is newer than 2.95 since we got lots of + dnl "`_POSIX_C_SOURCE' is not defined" in system headers with + dnl gcc 2.95.4 on FreeBSD 4.9! + WARN="$WARN -Wundef -Wno-long-long -Wsign-compare -Wshadow -Wno-multichar" + fi + if test "$ac_cv_compiler_num" -ge "296"; then + dnl gcc 2.96 or later + WARN="$WARN -Wfloat-equal" + fi + if test "$ac_cv_compiler_num" -gt "296"; then + dnl this option does not exist in 2.96 + WARN="$WARN -Wno-format-nonliteral" + fi + dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on + dnl on i686-Linux as it gives us heaps with false positives. + dnl Also, on gcc 4.0.X it is totally unbearable and complains all + dnl over making it unusable for generic purposes. Let's not use it. + if test "$ac_cv_compiler_num" -ge "303"; then + dnl gcc 3.3 and later + WARN="$WARN -Wendif-labels -Wstrict-prototypes" + fi + if test "$ac_cv_compiler_num" -ge "304"; then + # try these on gcc 3.4 + WARN="$WARN -Wdeclaration-after-statement" + fi + for flag in $CPPFLAGS; do + case "$flag" in + -I*) + dnl Include path, provide a -isystem option for the same dir + dnl to prevent warnings in those dirs. The -isystem was not very + dnl reliable on earlier gcc versions. + add=`echo $flag | sed 's/^-I/-isystem /g'` + WARN="$WARN $add" + ;; + esac + done + CFLAGS="$CFLAGS $WARN" + AC_MSG_NOTICE([Added this set of compiler options: $WARN]) else AC_MSG_RESULT([no]) fi |