graphics/OpenCASCADE: Fix cmake config. Check ffmpeg version

Signed-off-by: Christoph Willing <chris.willing@linux.com>

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

graphics/OpenCASCADE/OpenCASCADE.SlackBuild

@@ -32,7 +32,7 @@ cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=OpenCASCADE
 VERSION=${VERSION:-7.7.0}
-BUILD=${BUILD:-3}
+BUILD=${BUILD:-4}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
 
@@ -72,6 +72,10 @@ else
   LIBDIRSUFFIX=""
 fi
 
+# OpenCASCADE doesn't yet built with ffmpeg-7.*
+use_ffmpeg="-DUSE_FFMPEG=ON "
+if [[ "$(ffmpeg -version | sed -n "s/ffmpeg version \([-0-9.]*\).*/\1/p;")" == "7"* ]]; then use_ffmpeg="-DUSE_FFMPEG=OFF "; fi
+
 set -e
 
 rm -rf $PKG
@@ -101,13 +105,13 @@ mkdir -p build
 cd build
   cmake \
     -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
-    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
+    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS -fpermissive" \
     -DCMAKE_INSTALL_PREFIX=/usr \
     -DINSTALL_DIR_LIB=lib${LIBDIRSUFFIX} \
     -DINSTALL_DIR_CMAKE=lib${LIBDIRSUFFIX}/cmake/opencascade \
     -DINSTALL_DIR_DOC=doc/$PRGNAM-$VERSION \
     -DUSE_GLES2=OFF \
-    -DUSE_FFMPEG=ON \
+    $use_ffmpeg \
     -DUSE_FREEIMAGE=${WITH_FREEIMAGE:-OFF} \
     -DUSE_GL2PS=${WITH_GL2PS:-OFF} \
     -DUSE_TBB=${WITH_TBB:-OFF} \
@@ -123,6 +127,10 @@ cd ..
 find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
   | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
 
+cd $PKG/usr/lib${LIBDIRSUFFIX}/cmake/opencascade
+sed -i -e 's/\\\${OCCT_INSTALL_BIN_LETTER}//' *.cmake
+cd -
+
 mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
 cp -a \
   LICENSE_LGPL_21.txt OCCT_LGPL_EXCEPTION.txt README.txt \