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Add an autoconf test to check for optional compiler flags like

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-Wno-missing-field-initializers or -Wno-variadic-macros.

llvm-svn: 85147
This commit is contained in:
Julien Lerouge 2009-10-26 19:58:44 +00:00
parent 661ea989e9
commit e4492f6121
3 changed files with 14 additions and 0 deletions
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6
llvm/Makefile.config.in
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@ -320,3 +320,9 @@ ENABLE_LLVMC_DYNAMIC = 0
# support (via the -load option).
ENABLE_LLVMC_DYNAMIC_PLUGINS = 1
#@ENABLE_LLVMC_DYNAMIC_PLUGINS@
# Optional flags supported by the compiler
# -Wno-missing-field-initializers
NO_MISSING_FIELD_INITIALIZERS = @NO_MISSING_FIELD_INITIALIZERS@
# -Wno-variadic-macros
NO_VARIADIC_MACROS = @NO_VARIADIC_MACROS@

6
llvm/autoconf/configure.ac
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@ -943,6 +943,12 @@ fi
dnl Tool compatibility is okay if we make it here.
AC_MSG_RESULT([ok])
dnl Check optional compiler flags.
AC_MSG_CHECKING([optional compiler flags])
CXX_FLAG_CHECK(NO_VARIADIC_MACROS, [-Wno-variadic-macros])
CXX_FLAG_CHECK(NO_MISSING_FIELD_INITIALIZERS, [-Wno-missing-field-initializers])
AC_MSG_RESULT([$NO_VARIADIC_MACROS $NO_MISSING_FIELD_INITIALIZERS])
dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 5: Check for libraries

2
llvm/autoconf/m4/cxx_flag_check.m4 Normal file
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@ -0,0 +1,2 @@
AC_DEFUN([CXX_FLAG_CHECK],
[AC_SUBST($1, `$CXX $2 -fsyntax-only -xc /dev/null 2>/dev/null && echo $2`)])