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Problem: autoconf checks tautological compiler flag only for C++

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Solution: check for C as well and set the flags separately
This commit is contained in:
Luca Boccassi 2018-05-30 21:21:59 +01:00
parent 088fd65bf2
commit 06eaf20571
1 changed files with 7 additions and 1 deletions
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8
configure.ac
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@ -813,8 +813,14 @@ AM_CONDITIONAL([WITH_CLANG_FORMAT], [$WITH_CLANG_FORMAT])
AM_CONDITIONAL(ENABLE_STATIC, test "x$enable_static" = "xyes")
# clang 6 has a warning that does not make sense on multi-platform code
AC_LANG_PUSH([C])
AX_CHECK_COMPILE_FLAG([-Wno-tautological-constant-compare],
[CFLAGS+=" -Wno-tautological-constant-compare" CXXFLAGS+=" -Wno-tautological-constant-compare"],
[CFLAGS+=" -Wno-tautological-constant-compare"],
[],
[-Werror])
AC_LANG_POP([C])
AX_CHECK_COMPILE_FLAG([-Wno-tautological-constant-compare],
[CXXFLAGS+=" -Wno-tautological-constant-compare"],
[],
[-Werror])