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| author | Haru <haru@dotalux.com> | 2018-08-25 16:50:52 +0200 |
|---|---|---|
| committer | Haru <haru@dotalux.com> | 2018-08-25 17:52:21 +0200 |
| commit | 919f004106a705947a52ead1b6b23238cbe10218 (patch) | |
| tree | 40040c86649ae45319c31f34db18692d955f8f03 /configure.ac | |
| parent | 234189f34e5f055c82654b8cd35330822e8aa4d7 (diff) | |
| download | hercules-919f004106a705947a52ead1b6b23238cbe10218.tar.gz hercules-919f004106a705947a52ead1b6b23238cbe10218.tar.bz2 hercules-919f004106a705947a52ead1b6b23238cbe10218.tar.xz hercules-919f004106a705947a52ead1b6b23238cbe10218.zip | |
Change language specification to c11 in the autoconf builds
Fixes an issue with certain glibc versions using the emulated
`_Static_assert` (allowing only one assertion per scope) despite the
compiler having built-in support for the c11 version.
Fixes builds in Debian stretch and other distributions.
Signed-off-by: Haru <haru@dotalux.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 1bb30b09f..4d5f4bcfd 100644 --- a/configure.ac +++ b/configure.ac @@ -638,7 +638,37 @@ AC_LANG([C]) # -Werror-implicit-function-declaration -Wtrampolines # -Wjump-misses-init -CFLAGS="$CFLAGS -pipe -ffast-math -Wall -Wextra -Wno-sign-compare -std=c99" +AC_MSG_CHECKING([whether $CC supports -std=c11]) +OLD_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -std=c11" +AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([int foo;])], + [ + AC_MSG_RESULT([yes]) + ], + [ + AC_MSG_RESULT([no]) + + AC_MSG_CHECKING([whether $CC supports -std=c1x]) + CFLAGS="$OLD_CFLAGS -std=c1x" + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([int foo;])], + [ + AC_MSG_RESULT([yes]) + ], + [ + AC_MSG_RESULT([no, falling back to -std=c99]) + CFLAGS="$OLD_CFLAGS -std=c99" + ] + ) + ], + [ + AC_MSG_RESULT([guessing no]) + CFLAGS="$OLD_CFLAGS -std=c99" + ] +) + +CFLAGS="$CFLAGS -pipe -ffast-math -Wall -Wextra -Wno-sign-compare" CPPFLAGS="$CPPFLAGS -I../common" LDFLAGS="$LDFLAGS" |