1# ao.m4 2# Configure paths for libao 3# Jack Moffitt <jack@icecast.org> 10-21-2000 4# Shamelessly stolen from Owen Taylor and Manish Singh 5 6dnl AM_PATH_AO([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) 7dnl Test for libao, and define AO_CFLAGS and AO_LIBS 8dnl 9AC_DEFUN(AM_PATH_AO, 10[dnl 11dnl Get the cflags and libraries 12dnl 13AC_ARG_WITH(ao-prefix,[ --with-ao-prefix=PFX Prefix where libao is installed (optional)], ao_prefix="$withval", ao_prefix="") 14AC_ARG_ENABLE(aotest, [ --disable-aotest Do not try to compile and run a test ao program],, enable_aotest=yes) 15 16 if test "x$ao_prefix" != "xNONE" ; then 17 ao_args="$ao_args --prefix=$ao_prefix" 18 AO_CFLAGS="-I$ao_prefix/include" 19 AO_LIBS="-L$ao_prefix/lib" 20 elif test "$prefix" != ""; then 21 ao_args="$ao_args --prefix=$prefix" 22 AO_CFLAGS="-I$prefix/include" 23 AO_LIBS="-L$prefix/lib" 24 fi 25 26 # see where dl* and friends live 27 AC_CHECK_FUNCS(dlopen, [AO_DL_LIBS=""], [ 28 AC_CHECK_LIB(dl, dlopen, [AO_DL_LIBS="-ldl"], [ 29 AC_MSG_ERROR([could not find dlopen() needed by libao sound drivers 30 your system may not be supported.]) 31 ]) 32 ]) 33 34 AO_LIBS="$AO_LIBS -lao $AO_DL_LIBS" 35 36 AC_MSG_CHECKING(for ao) 37 no_ao="" 38 39 40 if test "x$enable_aotest" = "xyes" ; then 41 ac_save_CFLAGS="$CFLAGS" 42 ac_save_LIBS="$LIBS" 43 CFLAGS="$CFLAGS $AO_CFLAGS" 44 LIBS="$LIBS $AO_LIBS" 45dnl 46dnl Now check if the installed ao is sufficiently new. 47dnl 48 rm -f conf.aotest 49 AC_TRY_RUN([ 50#include <stdio.h> 51#include <stdlib.h> 52#include <string.h> 53#include <ao/ao.h> 54 55int main () 56{ 57 system("touch conf.aotest"); 58 return 0; 59} 60 61],, no_ao=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"]) 62 CFLAGS="$ac_save_CFLAGS" 63 LIBS="$ac_save_LIBS" 64 fi 65 66 if test "x$no_ao" = "x" ; then 67 AC_MSG_RESULT(yes) 68 ifelse([$1], , :, [$1]) 69 else 70 AC_MSG_RESULT(no) 71 if test -f conf.aotest ; then 72 : 73 else 74 echo "*** Could not run ao test program, checking why..." 75 CFLAGS="$CFLAGS $AO_CFLAGS" 76 LIBS="$LIBS $AO_LIBS" 77 AC_TRY_LINK([ 78#include <stdio.h> 79#include <ao/ao.h> 80], [ return 0; ], 81 [ echo "*** The test program compiled, but did not run. This usually means" 82 echo "*** that the run-time linker is not finding ao or finding the wrong" 83 echo "*** version of ao. If it is not finding ao, you'll need to set your" 84 echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point" 85 echo "*** to the installed location Also, make sure you have run ldconfig if that" 86 echo "*** is required on your system" 87 echo "***" 88 echo "*** If you have an old version installed, it is best to remove it, although" 89 echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"], 90 [ echo "*** The test program failed to compile or link. See the file config.log for the" 91 echo "*** exact error that occured. This usually means ao was incorrectly installed" 92 echo "*** or that you have moved ao since it was installed." ]) 93 CFLAGS="$ac_save_CFLAGS" 94 LIBS="$ac_save_LIBS" 95 fi 96 AO_CFLAGS="" 97 AO_LIBS="" 98 ifelse([$2], , :, [$2]) 99 fi 100 AC_SUBST(AO_CFLAGS) 101 AC_SUBST(AO_LIBS) 102 rm -f conf.aotest 103]) 104 105