update configure to find libpng 1.4

git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@2539 b956fd51-792f-4845-bead-9b4dfca2ff2c

2 files changed, 244 insertions, 4 deletions

diff --git a/configure b/configure
index 9cc84680..efe6649b 100755
--- a/configure
+++ b/configure
@@ -607,6 +607,11 @@ libavcodec_VERSION_MINOR
 libavcodec_VERSION_MAJOR
 libavcodec_VERSION
 lua_LIB_NAME
+libpng_VERSION_INT
+libpng_VERSION_RELEASE
+libpng_VERSION_MINOR
+libpng_VERSION_MAJOR
+libpng_VERSION
 DARWIN_VERSION
 MACOSX_VERSION
 MACOSX_VERSION_INT
@@ -738,6 +743,7 @@ CXX
 CXXFLAGS
 CCC
 PKG_CONFIG
+libpng_VERSION
 libavcodec_VERSION
 libavformat_VERSION
 libavutil_VERSION
@@ -1403,6 +1409,8 @@ Some influential environment variables:
   CXX         C++ compiler command
   CXXFLAGS    C++ compiler flags
   PKG_CONFIG  path to pkg-config utility
+  libpng_VERSION
+              version of libpng, overriding pkg-config
   libavcodec_VERSION
               version of libavcodec, overriding pkg-config
   libavformat_VERSION
@@ -4314,7 +4322,8 @@ fi
 # check for libraries
 # -----------------------------------------
 
-# libpng
+# find libpng
+# pkgconfig name for 1.2 is "libpng12", for 1.4 "libpng"
 
     have_lib="no"
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for libpng12" >&5
@@ -4360,7 +4369,7 @@ $as_echo "yes" >&6; }
 $as_echo "no" >&6; }
 
         # check if package is required
-        if test xyes = xyes -o x"$with_libpng" = xyes ; then
+        if test xno = xyes -o x"$with_libpng" = xyes ; then
             # print error message and quit
             err_msg=`$PKG_CONFIG --errors-to-stdout --print-errors "libpng12"`
             as_fn_error "
@@ -4376,6 +4385,229 @@ See the pkg-config man page for more details.
         fi
     fi
 
+if [ x$libpng_HAVE = xyes ]; then
+
+    if test x$libpng_HAVE = xyes; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of libpng" >&5
+$as_echo_n "checking version of libpng... " >&6; }
+
+
+    # check if variable was defined by the user
+    if test -z "$libpng_VERSION"; then
+        # if not, get it from pkg-config
+        if test x$libpng_HAVE = xyes; then
+            if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libpng12\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libpng12") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  libpng_VERSION=`$PKG_CONFIG --modversion --silence-errors "libpng12"`
+else
+  # print error message and quit
+                 err_msg=`$PKG_CONFIG --errors-to-stdout --print-errors "libpng12"`
+                 as_fn_error "
+
+$err_msg
+
+If --with-libpng=nocheck is defined the environment variable
+libpng_VERSION
+must be set to avoid the need to call pkg-config.
+
+See the pkg-config man page for more details.
+" "$LINENO" 5
+
+
+fi
+        fi
+    fi
+
+
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: [$libpng_VERSION]" >&5
+$as_echo "[$libpng_VERSION]" >&6; }
+    else
+        libpng_VERSION="0.0.0"
+    fi
+
+    version=$libpng_VERSION
+
+    # strip leading non-numeric tokens
+    # (necessary for some ffmpeg-packages in ubuntu)
+    # example: 0d.51.1.0 -> 51.1.0
+    version=`echo $version | sed 's/^[^.]*[^0-9.][^.]*\.//'`
+
+    # replace "." and "-" with " " and ignore trailing tokens.
+    # 1.23.4-r2 will be splitted to [maj=1, min=23, rel=4].
+    # In addition we delete everything after the first character
+    # which is not 0-9.
+    # 1.3a4-r32 will be [maj=1, min=3, rel=0].
+    read major minor release ignore <<eof
+        `echo $version | tr '.-' ' ' | sed 's/[^0-9\ ].*//'`
+eof
+    # Note: Do NOT indent the eof-delimiter
+    # We use a here-document (<<< here-strings not POSIX compatible)
+
+    test -z $major && major=0
+    test -z $minor && minor=0
+    test -z $release && release=0
+
+    # strip preceding 0s and set unset version-parts to 0
+    libpng_VERSION_MAJOR=$(($major))
+    libpng_VERSION_MINOR=$(($minor))
+    libpng_VERSION_RELEASE=$(($release))
+    # integer representation: MMMmmmrrr (M:major,m:minor,r:release)
+    # can be used if pkg-config's comparison fails
+    libpng_VERSION_INT=$(($libpng_VERSION_MAJOR*1000000+$libpng_VERSION_MINOR*1000+$libpng_VERSION_RELEASE))
+
+
+
+
+
+
+
+else
+    # check for the generic .pc file
+
+    have_lib="no"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for libpng >= 1.2" >&5
+$as_echo_n "checking for libpng >= 1.2... " >&6; }
+    if test x"$with_libpng" = xnocheck; then
+        # do not call pkg-config, use user settings
+        have_lib="yes"
+    elif test x"$with_libpng" != xno; then
+        # check if package exists
+	if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libpng >= 1.2\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libpng >= 1.2") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+
+            have_lib="yes"
+            libpng_LIBS=`$PKG_CONFIG --libs --silence-errors "libpng >= 1.2"`
+            libpng_LIBDIRS=`$PKG_CONFIG --libs-only-L --silence-errors "libpng >= 1.2"`
+            libpng_LIBDIRS=`
+    echo "$libpng_LIBDIRS" | $SED 's/^[ \t]*//' | $SED 's/[ \t]*$//'
+`
+            # add library directories to LIBS (ignore *_LIBS for now)
+	    if test -n "$libpng_LIBDIRS"; then
+                LIBS="$LIBS $libpng_LIBDIRS"
+            fi
+
+fi
+    fi
+    if test x$have_lib = xyes; then
+        libpng_HAVE="yes"
+        if test -n "$libpng_LIBDIRS"; then
+            # show additional lib-dirs
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes ($libpng_LIBDIRS)" >&5
+$as_echo "yes ($libpng_LIBDIRS)" >&6; }
+        else
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+        fi
+    else
+        libpng_HAVE="no"
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+        # check if package is required
+        if test xyes = xyes -o x"$with_libpng" = xyes ; then
+            # print error message and quit
+            err_msg=`$PKG_CONFIG --errors-to-stdout --print-errors "libpng >= 1.2"`
+            as_fn_error "
+
+$err_msg
+
+Alternatively, you may set --with-libpng=nocheck and the environment
+variables libpng_[...] (see configure --help)
+to appropriate values to avoid the need to call pkg-config.
+
+See the pkg-config man page for more details.
+" "$LINENO" 5
+        fi
+    fi
+
+
+    if test x$libpng_HAVE = xyes; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of libpng" >&5
+$as_echo_n "checking version of libpng... " >&6; }
+
+
+    # check if variable was defined by the user
+    if test -z "$libpng_VERSION"; then
+        # if not, get it from pkg-config
+        if test x$libpng_HAVE = xyes; then
+            if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libpng >= 1.2\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libpng >= 1.2") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  libpng_VERSION=`$PKG_CONFIG --modversion --silence-errors "libpng >= 1.2"`
+else
+  # print error message and quit
+                 err_msg=`$PKG_CONFIG --errors-to-stdout --print-errors "libpng >= 1.2"`
+                 as_fn_error "
+
+$err_msg
+
+If --with-libpng=nocheck is defined the environment variable
+libpng_VERSION
+must be set to avoid the need to call pkg-config.
+
+See the pkg-config man page for more details.
+" "$LINENO" 5
+
+
+fi
+        fi
+    fi
+
+
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: [$libpng_VERSION]" >&5
+$as_echo "[$libpng_VERSION]" >&6; }
+    else
+        libpng_VERSION="0.0.0"
+    fi
+
+    version=$libpng_VERSION
+
+    # strip leading non-numeric tokens
+    # (necessary for some ffmpeg-packages in ubuntu)
+    # example: 0d.51.1.0 -> 51.1.0
+    version=`echo $version | sed 's/^[^.]*[^0-9.][^.]*\.//'`
+
+    # replace "." and "-" with " " and ignore trailing tokens.
+    # 1.23.4-r2 will be splitted to [maj=1, min=23, rel=4].
+    # In addition we delete everything after the first character
+    # which is not 0-9.
+    # 1.3a4-r32 will be [maj=1, min=3, rel=0].
+    read major minor release ignore <<eof
+        `echo $version | tr '.-' ' ' | sed 's/[^0-9\ ].*//'`
+eof
+    # Note: Do NOT indent the eof-delimiter
+    # We use a here-document (<<< here-strings not POSIX compatible)
+
+    test -z $major && major=0
+    test -z $minor && minor=0
+    test -z $release && release=0
+
+    # strip preceding 0s and set unset version-parts to 0
+    libpng_VERSION_MAJOR=$(($major))
+    libpng_VERSION_MINOR=$(($minor))
+    libpng_VERSION_RELEASE=$(($release))
+    # integer representation: MMMmmmrrr (M:major,m:minor,r:release)
+    # can be used if pkg-config's comparison fails
+    libpng_VERSION_INT=$(($libpng_VERSION_MAJOR*1000000+$libpng_VERSION_MINOR*1000+$libpng_VERSION_RELEASE))
+
+
+
+
+
+
+
+fi
 
 # find sdl
 
diff --git a/configure.ac b/configure.ac
index 36b4e4ab..99f2fb3f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -154,8 +154,16 @@ fi
 # check for libraries
 # -----------------------------------------
 
-# libpng
-PKG_HAVE([libpng], [libpng12], yes)
+# find libpng
+# pkgconfig name for 1.2 is "libpng12", for 1.4 "libpng"
+PKG_HAVE([libpng], [libpng12], no)
+if [[ x$libpng_HAVE = xyes ]]; then
+    PKG_VERSION([libpng], [libpng12])
+else
+    # check for the generic .pc file
+    PKG_HAVE([libpng], [libpng >= 1.2], yes)
+    PKG_VERSION([libpng], [libpng >= 1.2])
+fi
 
 # find sdl
 PKG_HAVE([sdl], [sdl], yes)