1 # AC_CHECK_FASTCALL([if-ok],[if-notok])
2 # Test if the compiler recognizes __attribute__((regparm(3))) - we don't
3 # currently check if it actually works correctly, but probably should...
4 # -----------------------
5 AC_DEFUN([AC_CHECK_FASTCALL], [
6 AC_MSG_CHECKING([support for fastcall calling conventions]);
9 int __attribute__((regparm(3))) foo(int a, int b) { return a+b; }
11 int main(int argc, char *argv[])
13 return foo( 1, 2 ) == 3 ? 0 : 1;
21 # AC_CHECK_FORCEINLINE([if-ok],[if-notok])
22 # Test if the compiler recognizes __attribute__((always_inline))
23 # -----------------------
24 AC_DEFUN([AC_CHECK_FORCEINLINE], [
25 AC_MSG_CHECKING([support for force inlining]);
28 static int __attribute__((always_inline)) foo(int a, int b) { return a+b; }
30 int main(int argc, char *argv[])
32 return foo( 1, 2 ) == 3 ? 0 : 1;
34 FORCEINLINE="__attribute__((always_inline))"
35 AC_MSG_RESULT([$FORCEINLINE])
42 # AC_CHECK_FRAME_ADDRESS([if-ok],[if-notok])
43 # Test if the compiler will let us modify the return address on the stack
44 # via __builtin_frame_address()
45 # -----------------------
46 AC_DEFUN([AC_CHECK_FRAME_ADDRESS], [
47 AC_MSG_CHECKING([if we have a working __builtin_frame_address()]);
50 void * __attribute__((noinline)) first_arg( void *x, void *y ) { return x; }
51 int __attribute__((noinline)) foo( int arg, void *exc )
54 *(((void **)__builtin_frame_address(0))+1) = exc;
59 int main(int argc, char *argv[])
61 goto *first_arg(&&start, &&except);
64 return foo( argc, &&except ) + 1;
75 # AC_CC_VERSION([if-gcc], [if-icc],[if-other])
76 # Check which C compiler we're using and branch accordingly, eg to set
77 # different optimization flags. Currently recognizes gcc and icc
79 AC_DEFUN([AC_CC_VERSION], [
80 _GCC_VERSION=`$CC --version | $SED -ne '/gcc/p'`
81 _ICC_VERSION=`$CC --version | $SED -ne '/(ICC)/p'`
82 AC_MSG_CHECKING([CC version])
83 if test -n "$_ICC_VERSION"; then
86 elif test -n "$_GCC_VERSION"; then
90 AC_MSG_RESULT([Unknown])
95 # AC_OBJC_VERSION([if-gcc],[if-other], [if-none])
96 # Check which objective C compiler we're using and branch accordingly.
97 AC_DEFUN([AC_OBJC_VERSION], [
98 AC_MSG_CHECKING([OBJC version])
99 if test -n "$OBJC"; then
100 _GOBJC_VERSION=`$OBJC --version | $SED -ne '/(GCC)/p'`
101 if test -n "$_GOBJC_VERSION"; then
105 AC_MSG_RESULT([Unknown])
109 AC_MSG_RESULT([None])
114 # AC_HAVE_OBJC([if-present],[if-not-present])
115 # Check if we have a working Objective-C compiler
116 AC_DEFUN([AC_HAVE_OBJC], [
118 AC_MSG_CHECKING([for a working Objective-C compiler])
119 AC_LANG_PUSH([Objective C])dnl
120 _AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@interface Foo @end]], [])],
121 [AC_MSG_RESULT([yes])
125 AC_LANG_POP([Objective C])
.