1 dnl A version of AS_COMPILER_FLAG that supports both C and C++. 2 dnl Based on: 3 4 dnl as-compiler-flag.m4 0.1.0 5 dnl autostars m4 macro for detection of compiler flags 6 dnl David Schleef <ds (a] schleef.org> 7 dnl $Id: as-compiler-flag.m4,v 1.1 2005/06/18 18:02:46 burgerman Exp $ 8 9 dnl TP_COMPILER_FLAG(CFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED]) 10 dnl Tries to compile with the given CFLAGS and CXXFLAGS. 11 dnl 12 dnl Runs ACTION-IF-ACCEPTED if the compiler for the currently selected 13 dnl AC_LANG can compile with the flags, and ACTION-IF-NOT-ACCEPTED otherwise. 14 15 AC_DEFUN([TP_COMPILER_FLAG], 16 [ 17 AC_MSG_CHECKING([to see if compiler understands $1]) 18 19 save_CFLAGS="$CFLAGS" 20 save_CXXFLAGS="$CXXFLAGS" 21 CFLAGS="$CFLAGS $1" 22 CXXFLAGS="$CXXFLAGS $1" 23 24 AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no]) 25 CFLAGS="$save_CFLAGS" 26 CXXFLAGS="$save_CXXFLAGS" 27 28 if test "X$flag_ok" = Xyes ; then 29 $2 30 true 31 else 32 $3 33 true 34 fi 35 AC_MSG_RESULT([$flag_ok]) 36 ]) 37 38 dnl TP_ADD_COMPILER_FLAG(VARIABLE, CFLAGS) 39 dnl Append CFLAGS to VARIABLE if the compiler supports them. 40 AC_DEFUN([TP_ADD_COMPILER_FLAG], 41 [ 42 TP_COMPILER_FLAG([$2], [$1="[$]$1 $2"]) 43 ]) 44
