[llvm-commits] [llvm] r85147 - in /llvm/trunk: Makefile.config.in autoconf/configure.ac autoconf/m4/cxx_flag_check.m4

[Chris Lattner]

On Oct 26, 2009, at 12:58 PM, Julien Lerouge wrote:

> Author: jlerouge
> Date: Mon Oct 26 14:58:44 2009
> New Revision: 85147
>
> URL: http://llvm.org/viewvc/llvm-project?rev=85147&view=rev
> Log:
> Add an autoconf test to check for optional compiler flags like
> -Wno-missing-field-initializers or -Wno-variadic-macros.

Nice, thanks Julien!

-Chris

>
> Added:
>    llvm/trunk/autoconf/m4/cxx_flag_check.m4
> Modified:
>    llvm/trunk/Makefile.config.in
>    llvm/trunk/autoconf/configure.ac
>
> Modified: llvm/trunk/Makefile.config.in
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/Makefile.config.in?rev=85147&r1=85146&r2=85147&view=diff
>
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> --- llvm/trunk/Makefile.config.in (original)
> +++ llvm/trunk/Makefile.config.in Mon Oct 26 14:58:44 2009
> @@ -320,3 +320,9 @@
> # 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@
>
> Modified: llvm/trunk/autoconf/configure.ac
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/autoconf/configure.ac?rev=85147&r1=85146&r2=85147&view=diff
>
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> ======================================================================
> --- llvm/trunk/autoconf/configure.ac (original)
> +++ llvm/trunk/autoconf/configure.ac Mon Oct 26 14:58:44 2009
> @@ -943,6 +943,12 @@
> 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 
> = 
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> = 
> -----------------------------------------------------------------------= 
> ==
> dnl===
> dnl=== SECTION 5: Check for libraries
>
> Added: llvm/trunk/autoconf/m4/cxx_flag_check.m4
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/autoconf/m4/cxx_flag_check.m4?rev=85147&view=auto
>
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> ======================================================================
> --- llvm/trunk/autoconf/m4/cxx_flag_check.m4 (added)
> +++ llvm/trunk/autoconf/m4/cxx_flag_check.m4 Mon Oct 26 14:58:44 2009
> @@ -0,0 +1,2 @@
> +AC_DEFUN([CXX_FLAG_CHECK],
> +  [AC_SUBST($1, `$CXX $2 -fsyntax-only -xc /dev/null 2>/dev/null &&  
> echo $2`)])
>
>
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