$NetBSD: patch-configure,v 1.3 2024/05/08 12:49:06 micha Exp $

Add libtool support.
Upstream will not merge this (libtool is listed as not acceptable).
Fix png library name.

--- configure.orig	2023-12-09 14:02:17.000000000 +0000
+++ configure
@@ -1462,6 +1462,7 @@ Optional Features:
   --enable-cp936          turn on CP936 [default=no]
   --enable-gl             turn on OpenGL support [default=yes]
   --enable-shared         turn on shared libraries [default=no]
+  --enable-libtool        pkgsrc: Use libtool
   --enable-threads        enable multi-threading support [default=yes]
   --disable-largefile     omit support for large files
   --enable-localjpeg      use local JPEG library [default=auto]
@@ -4720,6 +4721,20 @@ then :
   enableval=$enable_shared;
 fi
 
+
+# pkgsrc: Check whether --enable-libtool or --disable-libtool was given.
+if test "${enable_libtool+set}" = set; then
+  enableval="$enable_libtool"
+
+if test x$enable_libtool != xno; then
+    LIBTOOL="$enable_libtool"
+    enable_shared=no
+else
+    LIBTOOL=""
+fi
+fi
+
+
 if test x$enable_shared = xyes; then
     PICFLAG=1
     SHAREDSUFFIX=""
@@ -4966,8 +4981,21 @@ else
 fi
 
 
-
-
+# pkgsrc: libtool support
+if test "x$LIBTOOL" != "x"; then
+    LINKFLTK="../src/libfltk.la"
+    if test "x$LINKFLTKGL" != "x"; then
+        LINKFLTKGL="../src/libfltk_gl.la"
+    fi
+    if test "x$LINKFLTKIMG" != "x"; then
+        LINKFLTKIMG="../src/libfltk_images.la"
+    fi
+    LINKSHARED="-lfltk_images -lfltk_forms -lfltk"
+    DSONAME="libfltk.la"
+    FLDSONAME="libfltk_forms.la"
+    GLDSONAME="libfltk_gl.la"
+    IMGDSONAME="libfltk_images.la"
+fi
 
 
 
@@ -6974,14 +7002,14 @@ syspnginc_ok=no
 if test x$enable_localpng != xyes
 then :
 
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for png_read_info in -lpng" >&5
-printf %s "checking for png_read_info in -lpng... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for png_read_info in -lpng16" >&5
+printf %s "checking for png_read_info in -lpng16... " >&6; }
 if test ${ac_cv_lib_png_png_read_info+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpng  $LIBS"
+LIBS="-lpng16  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -7125,18 +7153,18 @@ else $as_nop
 
     PNGINC=""
     PNG=""
-    IMAGELIBS="-lpng $IMAGELIBS"
+    IMAGELIBS="-lpng16 $IMAGELIBS"
     STATICIMAGELIBS="-lpng $STATICIMAGELIBS"
     printf "%s\n" "#define HAVE_LIBPNG 1" >>confdefs.h
 
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for png_get_valid in -lpng" >&5
-printf %s "checking for png_get_valid in -lpng... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for png_get_valid in -lpng16" >&5
+printf %s "checking for png_get_valid in -lpng16... " >&6; }
 if test ${ac_cv_lib_png_png_get_valid+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpng  $LIBS"
+LIBS="-lpng16  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -7172,14 +7200,14 @@ then :
 
 fi
 
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for png_set_tRNS_to_alpha in -lpng" >&5
-printf %s "checking for png_set_tRNS_to_alpha in -lpng... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for png_set_tRNS_to_alpha in -lpng16" >&5
+printf %s "checking for png_set_tRNS_to_alpha in -lpng16... " >&6; }
 if test ${ac_cv_lib_png_png_set_tRNS_to_alpha+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpng  $LIBS"
+LIBS="-lpng16  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */