| Olivier Naudan | b28313f | 2012-04-16 08:10:18 -0400 | [diff] [blame] | 1 | dnl as-gcc-inline-assembly.m4 0.1.0 |
| 2 | |
| 3 | dnl autostars m4 macro for detection of gcc inline assembly |
| 4 | |
| 5 | dnl David Schleef <ds@schleef.org> |
| 6 | |
| 7 | dnl $Id$ |
| 8 | |
| 9 | dnl AS_COMPILER_FLAG(ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED]) |
| 10 | dnl Tries to compile with the given CFLAGS. |
| 11 | dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags, |
| 12 | dnl and ACTION-IF-NOT-ACCEPTED otherwise. |
| 13 | |
| 14 | AC_DEFUN([AS_GCC_INLINE_ASSEMBLY], |
| 15 | [ |
| 16 | AC_MSG_CHECKING([if compiler supports gcc-style inline assembly]) |
| 17 | |
| 18 | AC_TRY_COMPILE([], [ |
| 19 | #ifdef __GNUC_MINOR__ |
| 20 | #if (__GNUC__ * 1000 + __GNUC_MINOR__) < 3004 |
| 21 | #error GCC before 3.4 has critical bugs compiling inline assembly |
| 22 | #endif |
| 23 | #endif |
| 24 | __asm__ (""::) ], [flag_ok=yes], [flag_ok=no]) |
| 25 | |
| 26 | if test "X$flag_ok" = Xyes ; then |
| 27 | $1 |
| 28 | true |
| 29 | else |
| 30 | $2 |
| 31 | true |
| 32 | fi |
| 33 | AC_MSG_RESULT([$flag_ok]) |
| 34 | ]) |
| 35 | |
| 36 | |
| 37 | AC_DEFUN([AS_GCC_ASM_POWERPC_FPU], |
| 38 | [ |
| 39 | AC_MSG_CHECKING([if compiler supports FPU instructions on PowerPC]) |
| 40 | |
| 41 | AC_TRY_COMPILE([], [__asm__ ("fadd 0,0,0"::) ], [flag_ok=yes], [flag_ok=no]) |
| 42 | |
| 43 | if test "X$flag_ok" = Xyes ; then |
| 44 | $1 |
| 45 | true |
| 46 | else |
| 47 | $2 |
| 48 | true |
| 49 | fi |
| 50 | AC_MSG_RESULT([$flag_ok]) |
| 51 | ]) |
| 52 | |
