From 7864ea636dbc271a2d66da71542639226e341d5c Mon Sep 17 00:00:00 2001
From: Albrecht Schlosser <albrechts.fltk@online.de>
Date: Tue, 21 Jan 2025 15:08:13 +0100
Subject: [PATCH] fltk-config: fix "Check bundled image libraries in source
 tree"

Avoid adding a non-existent folder to include directories (-I)
in `fltk-config --cxxflags` etc.
---
 fltk-config.in | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fltk-config.in b/fltk-config.in
index dee2cf008..d3ddcad3a 100644
--- a/fltk-config.in
+++ b/fltk-config.in
@@ -71,17 +71,18 @@ CAIROLIBS="@CAIROLIBS@"
 GLLIBS="@GLLIBS@"
 
 # Check bundled image libraries in source tree
-if test -f "$libdir/libfltk_jpeg.a"; then
+echo "--- includedir='$includedir' ---"
+if test -f "$libdir/libfltk_jpeg.a" -a -d $includedir/jpeg; then
     CFLAGS="-I$includedir/jpeg $CFLAGS"
     CXXFLAGS="-I$includedir/jpeg $CXXFLAGS"
 fi
 
-if test -f "$libdir/libfltk_z.a"; then
+if test -f "$libdir/libfltk_z.a" -a -d $includedir/zlib; then
     CFLAGS="-I$includedir/zlib $CFLAGS"
     CXXFLAGS="-I$includedir/zlib $CXXFLAGS"
 fi
 
-if test -f "$libdir/libfltk_png.a"; then
+if test -f "$libdir/libfltk_png.a" -a -d $includedir/png; then
     CFLAGS="-I$includedir/png $CFLAGS"
     CXXFLAGS="-I$includedir/png $CXXFLAGS"
 fi
-- 
GitLab