mirror of
https://github.com/curl/curl.git
synced 2025-03-19 15:40:42 +08:00
Adjust GCC warnings:
Better disable following warnings when cross-compiling with a gcc older
than 3.0, to avoid warnings from third party system headers:
-Wmissing-declarations
-Wmissing-prototypes
-Wunused
-Wshadow
This commit is contained in:
Yang Tse
parent
b7e71a249e
commit
fde4b823f1
@ -16,7 +16,7 @@
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#***************************************************************************
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# File version for 'aclocal' use. Keep it a single number.
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# serial 29
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# serial 32
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dnl CARES_CHECK_COMPILER
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@ -787,65 +787,95 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [
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GNU_C)
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#
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if test "$want_warnings" = "yes"; then
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#
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dnl Do not enable -pedantic when cross-compiling with a gcc older
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dnl than 3.0, to avoid warnings from third party system headers.
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if test "x$cross_compiling" != "xyes" ||
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test "$compiler_num" -ge "300"; then
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tmp_CFLAGS="$tmp_CFLAGS -pedantic"
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fi
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#
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dnl Set of options we believe *ALL* gcc versions support:
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tmp_CFLAGS="$tmp_CFLAGS -Wall -W -Winline -Wnested-externs"
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tmp_CFLAGS="$tmp_CFLAGS -Wpointer-arith -Wwrite-strings"
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dnl -Wcast-align is a bit too annoying on all gcc versions ;-)
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dnl Do not enable some warnings, when cross-compiling with a gcc
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dnl older than 3.0, triggered on third party system headers.
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if test "x$cross_compiling" != "xyes" ||
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test "$compiler_num" -ge "300"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wmissing-prototypes"
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tmp_CFLAGS="$tmp_CFLAGS -Wall -W"
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#
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dnl Only gcc 1.4 or later
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if test "$compiler_num" -ge "104"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wpointer-arith -Wwrite-strings"
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dnl If not cross-compiling with a gcc older than 3.0
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if test "x$cross_compiling" != "xyes" ||
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test "$compiler_num" -ge "300"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wunused -Wshadow"
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fi
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fi
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#
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dnl Only gcc 2.7 or later
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if test "$compiler_num" -ge "207"; then
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dnl gcc 2.7 or later
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tmp_CFLAGS="$tmp_CFLAGS -Wmissing-declarations"
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tmp_CFLAGS="$tmp_CFLAGS -Winline -Wnested-externs"
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dnl If not cross-compiling with a gcc older than 3.0
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if test "x$cross_compiling" != "xyes" ||
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test "$compiler_num" -ge "300"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wmissing-declarations"
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tmp_CFLAGS="$tmp_CFLAGS -Wmissing-prototypes"
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fi
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fi
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if test "$compiler_num" -gt "295"; then
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dnl only if the compiler is newer than 2.95 since we got lots of
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dnl "`_POSIX_C_SOURCE' is not defined" in system headers with
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dnl gcc 2.95.4 on FreeBSD 4.9!
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tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long -Wno-multichar -Wshadow"
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tmp_CFLAGS="$tmp_CFLAGS -Wsign-compare -Wundef"
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#
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dnl Only gcc 2.95 or later
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if test "$compiler_num" -ge "295"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long"
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fi
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#
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dnl Only gcc 2.96 or later
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if test "$compiler_num" -ge "296"; then
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dnl gcc 2.96 or later
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tmp_CFLAGS="$tmp_CFLAGS -Wfloat-equal"
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tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar -Wsign-compare"
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dnl -Wundef used only if gcc is 2.96 or later since we get
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dnl lots of "`_POSIX_C_SOURCE' is not defined" in system
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dnl headers with gcc 2.95.4 on FreeBSD 4.9
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tmp_CFLAGS="$tmp_CFLAGS -Wundef"
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fi
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if test "$compiler_num" -gt "296"; then
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dnl this option does not exist in 2.96
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#
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dnl Only gcc 2.97 or later
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if test "$compiler_num" -ge "297"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wno-format-nonliteral"
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fi
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dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
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dnl on i686-Linux as it gives us heaps with false positives.
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dnl Also, on gcc 4.0.X it is totally unbearable and complains all
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dnl over making it unusable for generic purposes. Let's not use it.
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#
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dnl Only gcc 3.0 or later
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if test "$compiler_num" -ge "300"; then
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dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
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dnl on i686-Linux as it gives us heaps with false positives.
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dnl Also, on gcc 4.0.X it is totally unbearable and complains all
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dnl over making it unusable for generic purposes. Let's not use it.
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tmp_CFLAGS="$tmp_CFLAGS"
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fi
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#
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dnl Only gcc 3.3 or later
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if test "$compiler_num" -ge "303"; then
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dnl gcc 3.3 and later
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tmp_CFLAGS="$tmp_CFLAGS -Wendif-labels -Wstrict-prototypes"
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fi
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#
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dnl Only gcc 3.4 or later
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if test "$compiler_num" -ge "304"; then
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dnl gcc 3.4 and later
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tmp_CFLAGS="$tmp_CFLAGS -Wdeclaration-after-statement"
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fi
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#
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fi
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#
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dnl Do not issue warnings for code in system include paths.
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if test "$compiler_num" -ge "300"; then
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dnl gcc 3.0 and later
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tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers"
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else
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dnl Disable some warnings, when cross-compiling with a gcc
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dnl older than 3.0, triggered on third party system headers.
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dnl When cross-compiling with a gcc older than 3.0, disable
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dnl some warnings triggered on third party system headers.
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if test "x$cross_compiling" = "xyes"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-prototypes"
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tmp_CFLAGS="$tmp_CFLAGS -Wno-unused -Wno-shadow"
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if test "$compiler_num" -ge "104"; then
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dnl gcc 1.4 or later
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tmp_CFLAGS="$tmp_CFLAGS -Wno-unused -Wno-shadow"
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fi
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if test "$compiler_num" -ge "207"; then
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dnl gcc 2.7 or later
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tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-declarations"
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tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-prototypes"
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fi
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fi
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fi
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;;
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@ -22,7 +22,7 @@
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#***************************************************************************
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# File version for 'aclocal' use. Keep it a single number.
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# serial 28
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# serial 31
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dnl CURL_CHECK_COMPILER
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@ -793,65 +793,95 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
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GNU_C)
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#
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if test "$want_warnings" = "yes"; then
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#
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dnl Do not enable -pedantic when cross-compiling with a gcc older
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dnl than 3.0, to avoid warnings from third party system headers.
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if test "x$cross_compiling" != "xyes" ||
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test "$compiler_num" -ge "300"; then
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tmp_CFLAGS="$tmp_CFLAGS -pedantic"
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fi
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#
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dnl Set of options we believe *ALL* gcc versions support:
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tmp_CFLAGS="$tmp_CFLAGS -Wall -W -Winline -Wnested-externs"
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tmp_CFLAGS="$tmp_CFLAGS -Wpointer-arith -Wwrite-strings"
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dnl -Wcast-align is a bit too annoying on all gcc versions ;-)
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dnl Do not enable some warnings, when cross-compiling with a gcc
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dnl older than 3.0, triggered on third party system headers.
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if test "x$cross_compiling" != "xyes" ||
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test "$compiler_num" -ge "300"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wmissing-prototypes"
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tmp_CFLAGS="$tmp_CFLAGS -Wall -W"
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#
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dnl Only gcc 1.4 or later
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if test "$compiler_num" -ge "104"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wpointer-arith -Wwrite-strings"
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dnl If not cross-compiling with a gcc older than 3.0
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if test "x$cross_compiling" != "xyes" ||
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test "$compiler_num" -ge "300"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wunused -Wshadow"
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fi
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fi
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#
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dnl Only gcc 2.7 or later
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if test "$compiler_num" -ge "207"; then
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dnl gcc 2.7 or later
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tmp_CFLAGS="$tmp_CFLAGS -Wmissing-declarations"
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tmp_CFLAGS="$tmp_CFLAGS -Winline -Wnested-externs"
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dnl If not cross-compiling with a gcc older than 3.0
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if test "x$cross_compiling" != "xyes" ||
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test "$compiler_num" -ge "300"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wmissing-declarations"
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tmp_CFLAGS="$tmp_CFLAGS -Wmissing-prototypes"
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fi
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fi
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if test "$compiler_num" -gt "295"; then
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dnl only if the compiler is newer than 2.95 since we got lots of
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dnl "`_POSIX_C_SOURCE' is not defined" in system headers with
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dnl gcc 2.95.4 on FreeBSD 4.9!
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tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long -Wno-multichar -Wshadow"
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tmp_CFLAGS="$tmp_CFLAGS -Wsign-compare -Wundef"
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#
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dnl Only gcc 2.95 or later
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if test "$compiler_num" -ge "295"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long"
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fi
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#
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dnl Only gcc 2.96 or later
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if test "$compiler_num" -ge "296"; then
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dnl gcc 2.96 or later
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tmp_CFLAGS="$tmp_CFLAGS -Wfloat-equal"
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tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar -Wsign-compare"
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dnl -Wundef used only if gcc is 2.96 or later since we get
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dnl lots of "`_POSIX_C_SOURCE' is not defined" in system
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dnl headers with gcc 2.95.4 on FreeBSD 4.9
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tmp_CFLAGS="$tmp_CFLAGS -Wundef"
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fi
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if test "$compiler_num" -gt "296"; then
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dnl this option does not exist in 2.96
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#
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dnl Only gcc 2.97 or later
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if test "$compiler_num" -ge "297"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wno-format-nonliteral"
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fi
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dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
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dnl on i686-Linux as it gives us heaps with false positives.
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dnl Also, on gcc 4.0.X it is totally unbearable and complains all
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dnl over making it unusable for generic purposes. Let's not use it.
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#
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dnl Only gcc 3.0 or later
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if test "$compiler_num" -ge "300"; then
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dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
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dnl on i686-Linux as it gives us heaps with false positives.
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dnl Also, on gcc 4.0.X it is totally unbearable and complains all
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dnl over making it unusable for generic purposes. Let's not use it.
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tmp_CFLAGS="$tmp_CFLAGS"
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fi
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#
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dnl Only gcc 3.3 or later
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if test "$compiler_num" -ge "303"; then
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dnl gcc 3.3 and later
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tmp_CFLAGS="$tmp_CFLAGS -Wendif-labels -Wstrict-prototypes"
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fi
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#
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dnl Only gcc 3.4 or later
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if test "$compiler_num" -ge "304"; then
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dnl gcc 3.4 and later
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tmp_CFLAGS="$tmp_CFLAGS -Wdeclaration-after-statement"
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fi
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#
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fi
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#
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dnl Do not issue warnings for code in system include paths.
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if test "$compiler_num" -ge "300"; then
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dnl gcc 3.0 and later
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tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers"
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else
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dnl Disable some warnings, when cross-compiling with a gcc
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dnl older than 3.0, triggered on third party system headers.
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dnl When cross-compiling with a gcc older than 3.0, disable
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dnl some warnings triggered on third party system headers.
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if test "x$cross_compiling" = "xyes"; then
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tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-prototypes"
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tmp_CFLAGS="$tmp_CFLAGS -Wno-unused -Wno-shadow"
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if test "$compiler_num" -ge "104"; then
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dnl gcc 1.4 or later
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tmp_CFLAGS="$tmp_CFLAGS -Wno-unused -Wno-shadow"
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fi
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if test "$compiler_num" -ge "207"; then
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dnl gcc 2.7 or later
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tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-declarations"
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tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-prototypes"
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fi
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fi
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fi
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;;
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