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Make sure that zlib and png are both local or system (#621) 

Autoconf syncs png and zlib configuration
Cmake png zlib selection
This commit is contained in:
Matthias Melcher 2023-01-01 17:29:23 +01:00 committed by GitHub
parent 9a3f0f2089
commit c8024c7a3b
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 60 additions and 29 deletions
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27
CMake/options.cmake
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@ -92,13 +92,34 @@ else ()
endif ()
#######################################################################
# Bundled Compression Library : zlib
# Make sure that png and zlib are either system or local for compatibility
#######################################################################
if (OPTION_USE_SYSTEM_ZLIB)
find_package (ZLIB)
endif ()
if (OPTION_USE_SYSTEM_LIBPNG)
find_package (PNG)
endif ()
# If we use the system zlib, we must also use the system png zlib and vice versa
# If either of them is not available, we fall back to using both local libraries
if (OPTION_USE_SYSTEM_LIBPNG AND NOT (OPTION_USE_SYSTEM_ZLIB AND ZLIB_FOUND))
set (PNG_FOUND FALSE)
set (OPTION_USE_SYSTEM_LIBPNG FALSE)
message (STATUS "Local z lib selected: overriding png lib to local for compatibility.\n")
endif ()
if (OPTION_USE_SYSTEM_ZLIB AND NOT (OPTION_USE_SYSTEM_LIBPNG AND PNG_FOUND))
set (ZLIB_FOUND FALSE)
set (OPTION_USE_SYSTEM_ZLIB FALSE)
message (STATUS "Local png lib selected: overriding z lib to local for compatibility.\n")
endif ()
#######################################################################
# Bundled Compression Library : zlib
#######################################################################
if (OPTION_USE_SYSTEM_ZLIB AND ZLIB_FOUND)
set (FLTK_USE_BUILTIN_ZLIB FALSE)
set (FLTK_ZLIB_LIBRARIES ${ZLIB_LIBRARIES})
@ -146,10 +167,6 @@ set (HAVE_LIBJPEG 1)
# Bundled Image Library : libpng
#######################################################################
if (OPTION_USE_SYSTEM_LIBPNG)
find_package (PNG)
endif ()
if (OPTION_USE_SYSTEM_LIBPNG AND PNG_FOUND)
set (FLTK_USE_BUILTIN_PNG FALSE)

62
configure.ac
View File

@ -681,29 +681,6 @@ AS_IF([test x$enable_localzlib != xyes], [
])
])
# Now set the Z lib and include flags according to the requested mode and availability
AS_IF([test x$enable_localzlib = xyes -o x$syszlib_ok = xno], [
ZLIBINC="-I../zlib"
ZLIB="zlib"
LIBS="-lfltk_z $LIBS"
IMAGELIBS="-lfltk_z $IMAGELIBS"
STATICIMAGELIBS="\$libdir/libfltk_z.a $STATICIMAGELIBS"
AC_DEFINE([HAVE_LIBZ])
ac_cv_lib_z_gzgets=no # fc: is still necessary ?
# Finally, warn user if system lib was requested but not found
AS_IF([test x$enable_localzlib = xno], [
AC_MSG_WARN([Cannot find system z lib or header: choosing the local lib mode.])
])
], [
ZLIBINC=""
ZLIB=""
LIBS="-lz $LIBS"
IMAGELIBS="-lz $IMAGELIBS"
STATICIMAGELIBS="-lz $STATICIMAGELIBS"
AC_DEFINE([HAVE_LIBZ])
])
# Handle the PNG lib linking mode (use fltk local or system lib)
# If --enable-(resp. --disable-)localpng parameter is not set by user
# Then we check the png lib usability with result in syspng_lib variable
@ -727,7 +704,44 @@ AS_IF([test x$enable_localpng != xyes], [
])
])
# The following is executed if the lib was not found usable or if local lib is required explicitly
# If we use the system zlib, we must also use the system png zlib and vice versa
# If either of them is not available, we fall back to using both local libraries
AS_IF([test x$syspnglib_ok = xyes -a x$syszlib_ok != xyes], [
syspnglib_ok=no
enable_localpng=yes
AC_MSG_WARN([Local z lib selected: overriding png lib to local for compatibility.])
])
AS_IF([test x$syszlib_ok = xyes -a x$syspnglib_ok != xyes], [
syszlib_ok=no
enable_localzlib=yes
AC_MSG_WARN([Local png lib selected: overriding z lib to local for compatibility.])
])
# Now set the Z lib and include flags according to the requested mode and availability
AS_IF([test x$enable_localzlib = xyes -o x$syszlib_ok = xno], [
ZLIBINC="-I../zlib"
ZLIB="zlib"
LIBS="-lfltk_z $LIBS"
IMAGELIBS="-lfltk_z $IMAGELIBS"
STATICIMAGELIBS="\$libdir/libfltk_z.a $STATICIMAGELIBS"
AC_DEFINE([HAVE_LIBZ])
ac_cv_lib_z_gzgets=no # fc: is still necessary ?
# Finally, warn user if system lib was requested but not found
AS_IF([test x$enable_localzlib = xno], [
AC_MSG_WARN([Cannot find system z lib or header: choosing the local lib mode.])
])
], [
ZLIBINC=""
ZLIB=""
LIBS="-lz $LIBS"
IMAGELIBS="-lz $IMAGELIBS"
STATICIMAGELIBS="-lz $STATICIMAGELIBS"
AC_DEFINE([HAVE_LIBZ])
])
# The following is executed if the png lib was not found usable or if local lib is required explicitly
AS_IF([test x$enable_localpng = xyes -o x$syspnglib_ok = xno], [
PNGINC="-I../png"
PNG="png"