--- aclocal.m4 2002/01/02 12:43:50 1.3
+++ aclocal.m4 2002/01/30 16:43:00 1.4
@@ -115,3 +115,115 @@
fi
])
+dnl ##
+dnl ## Check for an external/extension library.
+dnl ## - is aware of <libname>-config style scripts
+dnl ## - searches under standard paths include, lib, etc.
+dnl ## - searches under subareas like .libs, etc.
+dnl ##
+dnl ## configure.in:
+dnl ## AC_CHECK_EXTLIB(<realname>, <libname>, <func>, <header>,
+dnl ## [<success-action> [, <fail-action>]])
+dnl ## Makefile.in:
+dnl ## CFLAGS = @CFLAGS@
+dnl ## LDFLAGS = @LDFLAGS@
+dnl ## LIBS = @LIBS@
+dnl ## shell:
+dnl ## $ ./configure --with-<libname>[=DIR]
+dnl ##
+
+AC_DEFUN(AC_CHECK_EXTLIB,[dnl
+AC_ARG_WITH($2, [dnl
+[ --with-]m4_substr([$2[[=DIR]] ], 0, 19)[build with external $1 library (default=no)]], [dnl
+ if test ".$with_$2" = .yes; then
+ # via config script in PATH
+ $2_version=`($2-config --version) 2>/dev/null`
+ if test ".$$2_version" != .; then
+ CPPFLAGS="$CPPFLAGS `$2-config --cflags`"
+ CFLAGS="$CFLAGS `$2-config --cflags`"
+ LDFLAGS="$LDFLAGS `$2-config --ldflags`"
+ fi
+ else
+ if test -d "$with_$2"; then
+ found=0
+ # via config script
+ for dir in $with_$2/bin $with_$2; do
+ if test -f "$dir/$2-config" && test ! -f "$dir/$2-config.in"; then
+ $2_version=`($dir/$2-config --version) 2>/dev/null`
+ if test ".$$2_version" != .; then
+ CPPFLAGS="$CPPFLAGS `$dir/$2-config --cflags`"
+ CFLAGS="$CFLAGS `$dir/$2-config --cflags`"
+ LDFLAGS="$LDFLAGS `$dir/$2-config --ldflags`"
+ found=1
+ break
+ fi
+ fi
+ done
+ # in standard sub-areas
+ if test ".$found" = .0; then
+ for dir in $with_$2/include/$2 $with_$2/include $with_$2; do
+ if test -f "$dir/$4"; then
+ CPPFLAGS="$CPPFLAGS -I$dir"
+ CFLAGS="$CFLAGS -I$dir"
+ found=1
+ break
+ fi
+ done
+ for dir in $with_$2/lib/$2 $with_$2/lib $with_$2; do
+ if test -f "$dir/lib$2.la" && test -d "$dir/.libs"; then
+ LDFLAGS="$LDFLAGS -L$dir -L$dir/.libs"
+ found=1
+ break
+ elif test -f "$dir/lib$2.a" || test -f "$dir/lib$2.so"; then
+ LDFLAGS="$LDFLAGS -L$dir"
+ found=1
+ break
+ fi
+ done
+ fi
+ # in any sub-area
+ if test ".$found" = .0; then
+changequote(, )dnl
+ for file in x `find $with_$2 -name "$4" -type f -print`; do
+ test .$file = .x && continue
+ dir=`echo $file | sed -e 's;[^/]*$;;' -e 's;\(.\)/$;\1;'`
+ CPPFLAGS="$CPPFLAGS -I$dir"
+ CFLAGS="$CFLAGS -I$dir"
+ done
+ for file in x `find $with_$2 -name "lib$2.[aso]" -type f -print`; do
+ test .$file = .x && continue
+ dir=`echo $file | sed -e 's;[^/]*$;;' -e 's;\(.\)/$;\1;'`
+ LDFLAGS="$LDFLAGS -L$dir"
+ done
+changequote([, ])dnl
+ fi
+ fi
+ fi
+ AC_HAVE_HEADERS($4)
+ AC_CHECK_LIB($2, $3)
+ with_$2=yes
+ ac_var="ac_cv_header_`echo $4 | sed 'y%./+-%__p_%'`"
+ eval "ac_val=\$$ac_var"
+ if test ".$ac_val" != .yes; then
+ with_$2=no
+ fi
+ if test ".$ac_cv_lib_$2_$3" != .yes; then
+ with_$2=no
+ fi
+ if test ".$with_$2" = .no; then
+ AC_ERROR([Unable to find $1 library])
+ fi
+ ], [dnl
+if test ".$with_$2" = .; then
+ with_$2=no
+fi
+ ])dnl
+AC_MSG_CHECKING(whether to build against external $1 library)
+if test ".$with_$2" = .yes; then
+ ifelse([$5], , :, [$5])
+else
+ ifelse([$6], , :, [$6])
+fi
+AC_MSG_RESULT([$with_$2])
+])dnl
+
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