diff options
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index f09404329..66e1ef748 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -75,6 +75,7 @@ AC_DEFUN([AST_CHECK_MANDATORY], # The next three functions check for the availability of a given package. # AST_C_DEFINE_CHECK looks for the presence of a #define in a header file, +# AST_C_COMPILE_CHECK can be used for testing for various items in header files, # AST_EXT_LIB_CHECK looks for a symbol in a given library, or at least # for the presence of a header file. # AST_EXT_TOOL_CHECK looks for a symbol in using $1-config to determine CFLAGS and LIBS @@ -120,6 +121,35 @@ AC_DEFUN([AST_C_DEFINE_CHECK], ]) +# Check if a given expression will compile using a certain header. + +# AST_C_COMPILE_CHECK([package], [expression], [header file], [version]) +AC_DEFUN([AST_C_COMPILE_CHECK], +[ + if test "x${PBX_$1}" != "x1" -a "${USE_$1}" != "no"; then + AC_MSG_CHECKING([if "$2" compiles using $3]) + saved_cppflags="${CPPFLAGS}" + if test "x${$1_DIR}" != "x"; then + $1_INCLUDE="-I${$1_DIR}/include" + fi + CPPFLAGS="${CPPFLAGS} ${$1_INCLUDE}" + + AC_COMPILE_IFELSE( + [ AC_LANG_PROGRAM( [#include <$3>], + [ $2; ] + )], + [ AC_MSG_RESULT(yes) + PBX_$1=1 + AC_DEFINE([HAVE_$1], 1, [Define if your system has the $1 headers.]) + AC_DEFINE([HAVE_$1_VERSION], $4, [Define $1 headers version]) + ], + [ AC_MSG_RESULT(no) ] + ) + CPPFLAGS="${saved_cppflags}" + fi +]) + + # Check for existence of a given package ($1), either looking up a function # in a library, or, if no function is supplied, only check for the # existence of the header files. |