--- aclocal.m4 2001/08/15 10:36:03 1.3
+++ aclocal.m4 2001/09/11 10:37:04 1.4
@@ -186,3 +186,138 @@
AC_PROG_LIBTOOL
])
+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-]$2[[=DIR] build with external $1 library (default=no)]], [dnl
+ if test ".$with_$2" = .yes; then
+ # via config script
+ $2_version=`($2-config --version) 2>/dev/null`
+ if test ".$$2_version" != .; then
+ CPPFLAGS="$CPPFLAGS `$2-config --cflags`"
+ CFLAGS="$CFLAGS `$2-config --cflags`"
+ LDFLAGS="$LDFLAGS `$2-config --ldflags`"
+ fi
+ else
+ if test -d "$with_$2"; then
+ found=0
+ # via config script
+ for dir in $with_$2/bin $with_$2; do
+ if test -f "$dir/$2-config"; then
+ $2_version=`($dir/$2-config --version) 2>/dev/null`
+ if test ".$$2_version" != .; then
+ CPPFLAGS="$CPPFLAGS `$dir/$2-config --cflags`"
+ CFLAGS="$CFLAGS `$dir/$2-config --cflags`"
+ LDFLAGS="$LDFLAGS `$dir/$2-config --ldflags`"
+ found=1
+ break
+ fi
+ fi
+ done
+ # via standard paths
+ if test ".$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$2.a" -o -f "$dir/lib$2.so"; then
+ LDFLAGS="$LDFLAGS -L$dir"
+ found=1
+ break
+ fi
+ done
+ fi
+ # in any subarea
+ if test ".$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)
+ AC_IFALLYES(header:$4 lib:$2_$3, with_$2=yes, with_$2=no)
+ if test ".$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
+
+define(AC_IFALLYES,[dnl
+ac_rc=yes
+for ac_spec in $1; do
+ ac_type=`echo "$ac_spec" | sed -e 's/:.*$//'`
+ ac_item=`echo "$ac_spec" | sed -e 's/^.*://'`
+ case $ac_type in
+ header [)]
+ ac_item=`echo "$ac_item" | sed 'y%./+-%__p_%'`
+ ac_var="ac_cv_header_$ac_item"
+ ;;
+ file [)]
+ ac_item=`echo "$ac_item" | sed 'y%./+-%__p_%'`
+ ac_var="ac_cv_file_$ac_item"
+ ;;
+ func [)] ac_var="ac_cv_func_$ac_item" ;;
+ lib [)] ac_var="ac_cv_lib_$ac_item" ;;
+ define [)] ac_var="ac_cv_define_$ac_item" ;;
+ typedef [)] ac_var="ac_cv_typedef_$ac_item" ;;
+ custom [)] ac_var="$ac_item" ;;
+ esac
+ eval "ac_val=\$$ac_var"
+ if test ".$ac_val" != .yes; then
+ ac_rc=no
+ break
+ fi
+done
+if test ".$ac_rc" = .yes; then
+ :
+ $2
+else
+ :
+ $3
+fi
+])
+
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