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lxdream.org :: lxdream/acinclude.m4
lxdream 0.9.1
released Jun 29
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filename acinclude.m4
changeset 964:f2f3c7612d06
prev927:17b6b9e245d8
next977:8514fb4bc101
author nkeynes
date Thu Jan 15 04:15:11 2009 +0000 (11 years ago)
permissions -rw-r--r--
last change Add support for the Intel ICC compiler (C only, icc doesn't support Obj-C)
- Rename Obj-C source to .m
- Separate paths.c into paths_unix.c and paths_osx.m
- Add configuration detection of ICC, along with specific opt flags
file annotate diff log raw
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# AC_CHECK_FASTCALL([if-ok],[if-notok])
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# Test if the compiler recognizes __attribute__((regparm(3))) - we don't 
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# currently check if it actually works correctly, but probably should...
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# -----------------------
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AC_DEFUN([AC_CHECK_FASTCALL], [
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AC_MSG_CHECKING([support for fastcall calling conventions]);
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AC_RUN_IFELSE([
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  AC_LANG_SOURCE([[
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int __attribute__((regparm(3))) foo(int a, int b) { return a+b; }
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int main(int argc, char *argv[])
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{
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   return foo( 1, 2 ) == 3 ? 0 : 1;
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}]])], [ 
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   AC_MSG_RESULT([yes])
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   $1 ], [ 
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   AC_MSG_RESULT([no])
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   $2 ])
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])
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# AC_CHECK_FRAME_ADDRESS([if-ok],[if-notok])
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# Test if the compiler will let us modify the return address on the stack
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# via __builtin_frame_address()
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# -----------------------
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AC_DEFUN([AC_CHECK_FRAME_ADDRESS], [
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AC_MSG_CHECKING([if we have a working __builtin_frame_address()]);
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AC_RUN_IFELSE([
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  AC_LANG_SOURCE([[
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void * __attribute__((noinline)) first_arg( void *x, void *y ) { return x; }
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int __attribute__((noinline)) foo( int arg, void *exc )
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{
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    if( arg < 2 ) {
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        *(((void **)__builtin_frame_address(0))+1) = exc;
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    }
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    return 0;
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}
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int main(int argc, char *argv[])
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{
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   goto *first_arg(&&start, &&except);
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start:
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   return foo( argc, &&except ) + 1;
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except:
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   return 0;
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}]])], [ 
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   AC_MSG_RESULT([yes])
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   $1 ], [ 
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   AC_MSG_RESULT([no])
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   $2 ])
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])
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# AC_CC_VERSION([if-gcc], [if-icc],[if-other])
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# Check which C compiler we're using and branch accordingly, eg to set
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# different optimization flags. Currently recognizes gcc and icc
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# ---------------
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AC_DEFUN([AC_CC_VERSION], [
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_GCC_VERSION=`$CC --version | $SED -ne '/(GCC)/p'`
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_ICC_VERSION=`$CC --version | $SED -ne '/(ICC)/p'`
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AC_MSG_CHECKING([CC version])
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if test -n "$_GCC_VERSION"; then
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   AC_MSG_RESULT([GCC])
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   [ $1 ]
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elif test -n "$_ICC_VERSION"; then
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   AC_MSG_RESULT([ICC])
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   [ $2 ] 
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else 
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   AC_MSG_RESULT([Unknown])
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   [ $3 ]
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fi
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]);
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# AC_OBJC_VERSION([if-gcc],[if-other], [if-none])
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# Check which objective C compiler we're using and branch accordingly.
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AC_DEFUN([AC_OBJC_VERSION], [
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AC_MSG_CHECKING([OBJC version])
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if test -n "$OBJC"; then
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  _GOBJC_VERSION=`$OBJC --version | $SED -ne '/(GCC)/p'`
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  if test -n "$_GOBJC_VERSION"; then
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    AC_MSG_RESULT([GCC])
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    [ $1 ]
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  else 
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    AC_MSG_RESULT([Unknown])
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    [ $2 ]
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  fi
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else
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  AC_MSG_RESULT([None])
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  [ $3 ]
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fi
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]);
.