build: Import libmodplug test macros from autoconf-dx.

[upkg.git] / m4 / dxutils.m4

diff --git a/m4/dxutils.m4 b/m4/dxutils.m4
new file mode 100644 (file)
index 0000000..6df2438
--- /dev/null
+++ b/m4/dxutils.m4
@@ -0,0 +1,78 @@
+dnl Copyright (C) 2010 Nick Bowler
+dnl Copying and distribution of this file, with or without modification,
+dnl are permitted in any medium without royalty provided the copyright
+dnl notice and this notice are preserved.  This file is offered as-is,
+dnl without any warranty.
+
+m4_pattern_forbid([^_?DX_])
+
+dnl DX_PKG_CONFIG(env-base, [pkg-id], [pkg-help])
+AC_DEFUN([DX_PKG_CONFIG], [dnl
+AC_ARG_VAR(m4_toupper([$1])[_CFLAGS], [C compiler flags for ]ifelse(
+       [$3], [], [$1], [$3]))dnl
+AC_ARG_VAR(m4_toupper([$1])[_LIBS],   [linker flags for ]ifelse(
+       [$3], [], [$1], [$3]))dnl
+
+ifelse([$2], [], [], [dnl
+AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+if test x"$PKG_CONFIG" != x; then
+       AC_MSG_CHECKING([pkg-config database for $2])
+       pkg_failed=no
+       _PKG_CONFIG(m4_tolower([$1])[_cflags], [cflags], [$2])
+       _PKG_CONFIG(m4_tolower([$1])[_libs],   [libs],   [$2])
+       if test x$pkg_failed = xyes; then
+               errors=`$PKG_CONFIG --errors-to-stdout --print-errors $2`
+               echo "$errors" >&AS_MESSAGE_LOG_FD
+               AC_MSG_RESULT([no])
+       else
+               AC_MSG_RESULT([yes])
+       fi
+fi])])
+
+dnl _DX_CHECK_LIB(env-base, check-func, [cflags], [libs], [test])
+AC_DEFUN([_DX_CHECK_LIB], [dnl
+if test x"$dx_cv_[]m4_tolower([$1])_found" = x"no"; then
+if ifelse([$5], [], [:], [$5]); then
+       CFLAGS="$3 $dx_old_cflags"
+       LIBS="$4 $dx_old_libs"
+
+       $2([dnl
+               dx_cv_[]m4_tolower([$1])_found="yes"
+               dx_cv_[]m4_tolower([$1])_cflags="$3"
+               dx_cv_[]m4_tolower([$1])_libs="$4"
+       ])
+fi
+fi
+])
+
+dnl DX_CHECK_LIB_EXT(env-base, message, check-func,
+dnl              [[[cflags1],[libs1],[test1]],[[cflags2],[libs2],[test2]],...])
+AC_DEFUN([DX_CHECK_LIB_EXT], [dnl
+AC_LANG_PUSH([C])
+dx_old_cflags=$CFLAGS
+dx_old_libs=$LIBS
+
+AC_CACHE_CHECK([$2], [dx_cv_]m4_tolower([$1])[_found], [dnl
+AC_CACHE_VAL([dx_cv_]m4_tolower([$1])[_libs],   [dnl
+AC_CACHE_VAL([dx_cv_]m4_tolower([$1])[_cflags], [dnl
+       dx_cv_[]m4_tolower([$1])_found=no
+       m4_foreach([dx_tuple], [$4], [_DX_CHECK_LIB([$1], [$3], dx_tuple)])
+])])])
+
+if test x"$dx_cv_[]m4_tolower([$1])_found" = x"yes"; then
+       m4_toupper([$1])_CFLAGS=$dx_cv_[]m4_tolower([$1])_cflags
+       m4_toupper([$1])_LIBS=$dx_cv_[]m4_tolower([$1])_libs
+       AC_SUBST(m4_toupper([$1])[_CFLAGS])
+       AC_SUBST(m4_toupper([$1])[_LIBS])
+fi
+
+CFLAGS=$dx_old_cflags
+LIBS=$dx_old_libs
+AC_LANG_POP([C])
+])
+
+dnl DX_CHECK_LIB(env-base, message, test-program,
+dnl              [[[cflags1],[libs1],[test1]],[[cflags2],[libs2],[test2]],...])
+AC_DEFUN([DX_CHECK_LIB], [dnl
+       DX_CHECK_LIB_EXT([$1], [$2], [m4_curry([AC_LINK_IFELSE], [$3])], [$4])
+])