All,

  I was working on the digikam pngloader issue and received new jpegloader
errors in the latest GIT code. Specifically, I received the following jpegloader
warning just prior to the pngloader crash:

libtool: compile:  g++ -DHAVE_CONFIG_H -I. -I../../../.. -I/opt/trinity/include
-I/opt/tqt3/include -I. -include tqt.h -I../../../../digikam/libs/dimg
-I../../../../digikam/libs/dimg/filters -I../../../../digikam/libs/curves
-I../../../../digikam/libs/levels -I../../../../digikam/libs/histogram
-I../../../../digikam/libs/whitebalance -I../../../../digikam/libs/dmetadata
-I../../../../digikam/digikam -I/opt/trinity/include -I/opt/trinity/include
-DQT_THREAD_SUPPORT -D_REENTRANT -fno-tree-pre -Wno-long-long -Wundef -ansi
-D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wchar-subscripts -Wall -W
-Wpointer-arith -O2 -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector
--param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -fpermissive -Wformat-security
-Wmissing-format-attribute -Wno-non-virtual-dtor -fno-exceptions -fno-check-new
-fno-common -I/usr/include/tqt -DQT_CLEAN_NAMESPACE -DQT_NO_ASCII_CAST
-DQT_NO_STL -DQT_NO_COMPAT -DQT_NO_TRANSLATION -DQT_CLEAN_NAMESPACE -MT
jpegloader.lo -MD -MP -MF .deps/jpegloader.Tpo -c jpegloader.cpp  -fPIC -DPIC -o
.libs/jpegloader.o
jpegloader.cpp: In member function 'virtual bool Digikam::JPEGLoader::load(const
TQString&, Digikam::DImgLoaderObserver*)':
jpegloader.cpp:191:12: warning: enumeration value 'JCS_EXT_RGB' not handled in
switch [-Wswitch]
jpegloader.cpp:191:12: warning: enumeration value 'JCS_EXT_RGBX' not handled in
switch [-Wswitch]
jpegloader.cpp:191:12: warning: enumeration value 'JCS_EXT_BGR' not handled in
switch [-Wswitch]
jpegloader.cpp:191:12: warning: enumeration value 'JCS_EXT_BGRX' not handled in
switch [-Wswitch]
jpegloader.cpp:191:12: warning: enumeration value 'JCS_EXT_XBGR' not handled in
switch [-Wswitch]
jpegloader.cpp:191:12: warning: enumeration value 'JCS_EXT_XRGB' not handled in
switch [-Wswitch]
jpegloader.cpp:191:12: warning: enumeration value 'JCS_EXT_RGBA' not handled in
switch [-Wswitch]
jpegloader.cpp:191:12: warning: enumeration value 'JCS_EXT_BGRA' not handled in
switch [-Wswitch]
jpegloader.cpp:191:12: warning: enumeration value 'JCS_EXT_ABGR' not handled in
switch [-Wswitch]
jpegloader.cpp:191:12: warning: enumeration value 'JCS_EXT_ARGB' not handled in
switch [-Wswitch]
jpegloader.cpp:223:31: warning: variable 'count' set but not used
[-Wunused-but-set-variable]
jpegloader.cpp:223:38: warning: variable 'prevy' set but not used
[-Wunused-but-set-variable]
pngloader.cpp: In member function 'virtual bool Digikam::PNGLoader::load(const
TQString&, Digikam::DImgLoaderObserver*)':
pngloader.cpp:123:9: error: invalid use of incomplete type 'png_struct {aka
struct png_struct_def}'
/usr/include/png.h:855:16: error: forward declaration of 'png_struct {aka struct
png_struct_def}'
pngloader.cpp:410:99: warning: invalid conversion from 'char**' to 'png_bytepp
{aka unsigned char**}' [-fpermissive]
pngloader.cpp: In member function 'virtual bool Digikam::PNGLoader::save(const
TQString&, Digikam::DImgLoaderObserver*)':
pngloader.cpp:529:9: error: invalid use of incomplete type 'png_struct {aka
struct png_struct_def}'
/usr/include/png.h:855:16: error: forward declaration of 'png_struct {aka struct
png_struct_def}'
pngloader.cpp:602:132: warning: invalid conversion from 'char*' to
'png_const_bytep {aka const unsigned char*}' [-fpermissive]
pngloader.cpp:662:39: warning: deprecated conversion from string constant to
'png_charp {aka char*}' [-Wwrite-strings]
pngloader.cpp: In member function 'long int
Digikam::PNGLoader::formatStringList(char*, size_t, const char*, __va_list_tag*)':
pngloader.cpp:970:55: warning: function might be possible candidate for
'gnu_printf' format attribute [-Wmissing-format-attribute]
pngloader.cpp: In member function 'virtual bool Digikam::PNGLoader::load(const
TQString&, Digikam::DImgLoaderObserver*)':
pngloader.cpp:90:41: warning: ignoring return value of 'size_t fread(void*,
size_t, size_t, FILE*)', declared with attribute warn_unused_result
[-Wunused-result]
make[5]: *** [pngloader.lo] Error 1



  I have also uncovered a digikam patch,
http://bugsfiles.kde.org/attachment.cgi?id=56384 , that I don't think is a
direct patch for this problem, but hopefully it will help a bit. The patch is
labeled:

[Digikam-devel] [Bug 264181] New: png-1.5 compatibility fix
http://mail.kde.org/pipermail/digikam-devel/2011-January/048984.html

This patchfile is:

$NetBSD: patch-aa,v 1.11 2011/01/20 23:37:36 wiz Exp $

Fix build with png-1.5.

--- libs/dimg/loaders/pngloader.cpp.orig	2010-11-22 17:47:36.000000000 +0000
+++ libs/dimg/loaders/pngloader.cpp
@@ -494,7 +494,8 @@ bool PNGLoader::load(const QString& file

     if (m_loadFlags & LoadICCData)
     {
-        png_charp   profile_name, profile_data=NULL;
+        png_charp   profile_name;
+        png_bytep   profile_data=NULL;
         png_uint_32 profile_size;
         int         compression_type;

@@ -730,7 +731,7 @@ bool PNGLoader::save(const QString& file

     if (!profile_rawdata.isEmpty())
     {
-        png_set_iCCP(png_ptr, info_ptr, (png_charp)("icc"),
PNG_COMPRESSION_TYPE_BASE, profile_rawdata.data(), profile_rawdata.size());
+        png_set_iCCP(png_ptr, info_ptr, (png_charp)("icc"),
PNG_COMPRESSION_TYPE_BASE, (png_bytep)profile_rawdata.data(),
profile_rawdata.size());
     }

-- 
David C. Rankin, J.D.,P.E.