diff options
Diffstat (limited to 'ares/m4')
| -rw-r--r-- | ares/m4/cares-compilers.m4 | 92 |
1 files changed, 61 insertions, 31 deletions
diff --git a/ares/m4/cares-compilers.m4 b/ares/m4/cares-compilers.m4 index a54f33688..b9d1c32bd 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 29 +# serial 32 dnl CARES_CHECK_COMPILER @@ -787,65 +787,95 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [ GNU_C) # if test "$want_warnings" = "yes"; then + # dnl Do not enable -pedantic when cross-compiling with a gcc older dnl than 3.0, to avoid warnings from third party system headers. if test "x$cross_compiling" != "xyes" || test "$compiler_num" -ge "300"; then tmp_CFLAGS="$tmp_CFLAGS -pedantic" fi + # dnl Set of options we believe *ALL* gcc versions support: - tmp_CFLAGS="$tmp_CFLAGS -Wall -W -Winline -Wnested-externs" - tmp_CFLAGS="$tmp_CFLAGS -Wpointer-arith -Wwrite-strings" - dnl -Wcast-align is a bit too annoying on all gcc versions ;-) - dnl Do not enable some warnings, when cross-compiling with a gcc - dnl older than 3.0, triggered on third party system headers. - if test "x$cross_compiling" != "xyes" || - test "$compiler_num" -ge "300"; then - tmp_CFLAGS="$tmp_CFLAGS -Wmissing-prototypes" + tmp_CFLAGS="$tmp_CFLAGS -Wall -W" + # + dnl Only gcc 1.4 or later + if test "$compiler_num" -ge "104"; then + tmp_CFLAGS="$tmp_CFLAGS -Wpointer-arith -Wwrite-strings" + dnl If not cross-compiling with a gcc older than 3.0 + if test "x$cross_compiling" != "xyes" || + test "$compiler_num" -ge "300"; then + tmp_CFLAGS="$tmp_CFLAGS -Wunused -Wshadow" + fi fi + # + dnl Only gcc 2.7 or later if test "$compiler_num" -ge "207"; then - dnl gcc 2.7 or later - tmp_CFLAGS="$tmp_CFLAGS -Wmissing-declarations" + tmp_CFLAGS="$tmp_CFLAGS -Winline -Wnested-externs" + dnl If not cross-compiling with a gcc older than 3.0 + if test "x$cross_compiling" != "xyes" || + test "$compiler_num" -ge "300"; then + tmp_CFLAGS="$tmp_CFLAGS -Wmissing-declarations" + tmp_CFLAGS="$tmp_CFLAGS -Wmissing-prototypes" + fi fi - if test "$compiler_num" -gt "295"; then - dnl only if the compiler is newer than 2.95 since we got lots of - dnl "`_POSIX_C_SOURCE' is not defined" in system headers with - dnl gcc 2.95.4 on FreeBSD 4.9! - tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long -Wno-multichar -Wshadow" - tmp_CFLAGS="$tmp_CFLAGS -Wsign-compare -Wundef" + # + dnl Only gcc 2.95 or later + if test "$compiler_num" -ge "295"; then + tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long" fi + # + dnl Only gcc 2.96 or later if test "$compiler_num" -ge "296"; then - dnl gcc 2.96 or later tmp_CFLAGS="$tmp_CFLAGS -Wfloat-equal" + tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar -Wsign-compare" + dnl -Wundef used only if gcc is 2.96 or later since we get + dnl lots of "`_POSIX_C_SOURCE' is not defined" in system + dnl headers with gcc 2.95.4 on FreeBSD 4.9 + tmp_CFLAGS="$tmp_CFLAGS -Wundef" fi - if test "$compiler_num" -gt "296"; then - dnl this option does not exist in 2.96 + # + dnl Only gcc 2.97 or later + if test "$compiler_num" -ge "297"; then tmp_CFLAGS="$tmp_CFLAGS -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. + # + dnl Only gcc 3.0 or later + if test "$compiler_num" -ge "300"; then + dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on + dnl on i686-Linux as it gives us heaps with false positives. + dnl Also, on gcc 4.0.X it is totally unbearable and complains all + dnl over making it unusable for generic purposes. Let's not use it. + tmp_CFLAGS="$tmp_CFLAGS" + fi + # + dnl Only gcc 3.3 or later if test "$compiler_num" -ge "303"; then - dnl gcc 3.3 and later tmp_CFLAGS="$tmp_CFLAGS -Wendif-labels -Wstrict-prototypes" fi + # + dnl Only gcc 3.4 or later if test "$compiler_num" -ge "304"; then - dnl gcc 3.4 and later tmp_CFLAGS="$tmp_CFLAGS -Wdeclaration-after-statement" fi + # fi # dnl Do not issue warnings for code in system include paths. if test "$compiler_num" -ge "300"; then - dnl gcc 3.0 and later tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers" else - dnl Disable some warnings, when cross-compiling with a gcc - dnl older than 3.0, triggered on third party system headers. + dnl When cross-compiling with a gcc older than 3.0, disable + dnl some warnings triggered on third party system headers. if test "x$cross_compiling" = "xyes"; then - tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-prototypes" - tmp_CFLAGS="$tmp_CFLAGS -Wno-unused -Wno-shadow" + if test "$compiler_num" -ge "104"; then + dnl gcc 1.4 or later + tmp_CFLAGS="$tmp_CFLAGS -Wno-unused -Wno-shadow" + fi + if test "$compiler_num" -ge "207"; then + dnl gcc 2.7 or later + tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-declarations" + tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-prototypes" + fi fi fi ;; |