Hi, I'm attempting to build the current gnome-2.24 with jhbuild (rev 2033), and am stuck at configuring cairo-1.6.4 - the check for xlib and png fails. Strangely, when I manually run ./configure in cairo, there are no problems. The problem only occurs when jhbuild runs ./configure. I'm running Ubuntu 8.04 on i386. Any ideas on what I need to do to get a complete jhbuild? Thanks, Jeremiah Below is the output of the relevant section from jhbuild, and after that, the successful output by my own manual ./configure ----begin-----jhbuild------- ./configure --prefix /home/jeremiah/prefix --libdir '${exec_prefix}/lib'  --disable-static --disable-gtk-doc . . . checking for zlib.h... yes checking for pkg-config... /home/jeremiah/prefix/bin/pkg-config checking pkg-config is at least version <a href="http://0.9.0." target="_blank">0.9.0.</a>.. yes checking for pixman... yes checking for X... libraries , headers checking for cairo's Xlib backend... checking for xlib... no no checking for gethostbyname... yes checking for connect... yes checking for remove... yes checking for shmat... yes checking for IceConnectionNumber in -lICE... yes checking whether cairo's Xlib backend could be enabled... yes configure: creating src/cairo-xlib.pc checking for cairo's Xlib Xrender backend... checking for xlib_xrender... no no checking X11/extensions/Xrender.h usability... yes checking X11/extensions/Xrender.h presence... yes checking for X11/extensions/Xrender.h... yes checking whether cairo's Xlib Xrender backend could be enabled... yes configure: creating src/cairo-xlib-xrender.pc checking for cairo's Quartz backend... checking ApplicationServices/ApplicationServices.h usability... no checking ApplicationServices/ApplicationServices.h presence... no checking for ApplicationServices/ApplicationServices.h... no checking CoreGraphics/CoreGraphics.h usability... no checking CoreGraphics/CoreGraphics.h presence... no checking for CoreGraphics/CoreGraphics.h... no checking whether cairo's Quartz backend could be enabled... no (CoreGraphics framework not found) checking for cairo's Quartz font backend... checking whether cairo's Quartz font backend could be enabled... no (CoreGraphics framework not found) checking for native Win32... no checking windows.h usability... no checking windows.h presence... no checking for windows.h... no checking for cairo's Microsoft Windows backend... checking whether cairo's Microsoft Windows backend could be enabled... no (requires a Win32 platform) checking for cairo's Microsoft Windows font backend... checking whether cairo's Microsoft Windows font backend could be enabled... no (requires a Win32 platform) checking for cairo's PNG backend... configure: WARNING: Could not find libpng in the pkg-config search path checking whether cairo's PNG backend could be enabled... no configure: error: requested PNG backend could not be enabled *** error during stage configure of cairo: ########## Error running ./configure --prefix /home/jeremiah/prefix --libdir '${exec_prefix}/lib'  --disable-static --disable-gtk-doc  *** [15/77] ----end-----jhbuild------- ----begin-----manual------- jeremiah@ubook:~/cairo-1.6.4$ ./configure --prefix /home/jeremiah/prefix --libdir '${exec_prefix}/lib'  --disable-static --disable-gtk-doc . . . checking for zlib.h... yes checking for pkg-config... /usr/bin/pkg-config checking pkg-config is at least version <a href="http://0.9.0." target="_blank">0.9.0.</a>.. yes checking for pixman... yes checking for X... libraries , headers checking for cairo's Xlib backend... checking for xlib... yes checking whether cairo's Xlib backend could be enabled... yes configure: creating src/cairo-xlib.pc checking for cairo's Xlib Xrender backend... checking for xlib_xrender... yes checking whether cairo's Xlib Xrender backend could be enabled... yes configure: creating src/cairo-xlib-xrender.pc checking for cairo's Quartz backend... checking ApplicationServices/ApplicationServices.h usability... no checking ApplicationServices/ApplicationServices.h presence... no checking for ApplicationServices/ApplicationServices.h... no checking CoreGraphics/CoreGraphics.h usability... no checking CoreGraphics/CoreGraphics.h presence... no checking for CoreGraphics/CoreGraphics.h... no checking whether cairo's Quartz backend could be enabled... no (CoreGraphics framework not found) checking for cairo's Quartz font backend... checking whether cairo's Quartz font backend could be enabled... no (CoreGraphics framework not found) checking for native Win32... no checking windows.h usability... no checking windows.h presence... no checking for windows.h... no checking for cairo's Microsoft Windows backend... checking whether cairo's Microsoft Windows backend could be enabled... no (requires a Win32 platform) checking for cairo's Microsoft Windows font backend... checking whether cairo's Microsoft Windows font backend could be enabled... no (requires a Win32 platform) checking for cairo's PNG backend... checking for png... yes checking whether cairo's PNG backend could be enabled... yes configure: creating src/cairo-png.pc checking for cairo's FreeType font backend... checking for FONTCONFIG... yes checking for FcFini... yes checking for FREETYPE... yes checking whether cairo's FreeType font backend could be enabled... yes configure: creating src/cairo-ft.pc checking for FT_Bitmap_Size.y_ppem... yes checking for FT_GlyphSlot_Embolden... yes checking for FT_Load_Sfnt_Table... yes checking pthread.h usability... yes checking pthread.h presence... yes checking for pthread.h... yes checking for cairo's PostScript backend... checking whether cairo's PostScript backend could be enabled... yes configure: creating src/cairo-ps.pc checking for gs... gs checking for cairo's PDF backend... checking whether cairo's PDF backend could be enabled... yes configure: creating src/cairo-pdf.pc checking for POPPLER... no no configure: WARNING: PDF backend will not be tested since poppler >= 0.8.0 is not available checking for cairo's SVG backend... checking whether cairo's SVG backend could be enabled... yes configure: creating src/cairo-svg.pc checking for LIBRSVG... no no configure: WARNING: SVG backend will not be tested since librsvg >= 2.15.0 is not available checking for stdint.h... (cached) yes checking signal.h usability... yes checking signal.h presence... yes checking for signal.h... yes checking for inttypes.h... (cached) yes checking sys/int_types.h usability... no checking sys/int_types.h presence... no checking for sys/int_types.h... no checking for uint64_t... yes checking for uint128_t... no checking sched.h usability... yes checking sched.h presence... yes checking for sched.h... yes checking for sched_getaffinity... yes checking for sched_yield in -lrt... yes checking libgen.h usability... yes checking libgen.h presence... yes checking for libgen.h... yes checking for supported warning flags... checking whether gcc supports -Wall... yes checking whether gcc supports -Wextra... yes checking whether gcc supports -Wsign-compare... yes checking whether gcc supports -Werror-implicit-function-declaration... yes checking whether gcc supports -Wpointer-arith... yes checking whether gcc supports -Wwrite-strings... yes checking whether gcc supports -Wstrict-prototypes... yes checking whether gcc supports -Wmissing-prototypes... yes checking whether gcc supports -Wmissing-declarations... yes checking whether gcc supports -Wnested-externs... yes checking whether gcc supports -Wpacked... yes checking whether gcc supports -Wswitch-enum... yes checking whether gcc supports -Wmissing-format-attribute... yes checking whether gcc supports -Wstrict-aliasing=2... yes checking whether gcc supports -Winit-self... yes checking whether gcc supports -Wunsafe-loop-optimizations... yes checking whether gcc supports -Wdeclaration-after-statement... yes checking whether gcc supports -Wold-style-definition... yes checking whether gcc supports -Wno-missing-field-initializers... yes checking whether gcc supports -Wno-unused-parameter... yes checking whether gcc supports -Wno-attributes... yes checking whether gcc supports -Wno-long-long... yes checking whether gcc supports -Winline... yes checking which warning flags were supported...  -Wall -Wextra -Wsign-compare -Werror-implicit-function-declaration -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Wpacked -Wswitch-enum -Wmissing-format-attribute -Wstrict-aliasing=2 -Winit-self -Wunsafe-loop-optimizations -Wdeclaration-after-statement -Wold-style-definition -Wno-missing-field-initializers -Wno-unused-parameter -Wno-attributes -Wno-long-long -Winline checking how to enable unused result warnings... __attribute__((__warn_unused_result__)) checking whether gcc supports -fno-strict-aliasing... yes checking for MMX/SSE intrinsics in the compiler... yes configure: creating ./config.status config.status: creating Makefile config.status: creating boilerplate/Makefile config.status: creating src/Makefile config.status: creating test/Makefile config.status: creating test/pdiff/Makefile config.status: creating perf/Makefile config.status: creating util/Makefile config.status: creating doc/Makefile config.status: creating doc/public/Makefile config.status: creating doc/public/version.xml config.status: creating src/cairo.pc config.status: creating config.h config.status: executing depfiles commands config.status: executing src/cairo-features.h commands config.status: creating src/cairo-features.h config.status: executing src/cairo-no-features.h commands config.status: creating src/cairo-no-features.h cairo (version 1.6.4) will be compiled with the following surface backends:   image:         yes (always builtin)   Xlib:          yes   Xlib Xrender:  yes   Quartz:        no (CoreGraphics framework not found)   Quartz-image:  no (disabled, use --enable-quartz-image to enable)   XCB:           no (disabled, use --enable-xcb to enable)   Win32:         no (requires a Win32 platform)   OS2:           no (disabled, use --enable-os2 to enable)   PostScript:    yes   PDF:           yes   SVG:           yes   glitz:         no (disabled, use --enable-glitz to enable)   BeOS:          no (disabled, use --enable-beos to enable)   DirectFB:      no (disabled, use --enable-directfb to enable) the following font backends:   FreeType:      yes   Win32:         no (requires a Win32 platform)   Quartz:        no (CoreGraphics framework not found) the following features:   PNG functions: yes and the following debug options:   gcov support:  no   test surfaces: no   ps testing:    yes   pdf testing:   no (requires poppler-glib >= 0.8.0)   svg testing:   no (requires librsvg-2.0 >= 2.15.0) using CFLAGS: -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/pixman-1 -Wall -Wextra -Wsign-compare -Werror-implicit-function-declaration -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Wpacked -Wswitch-enum -Wmissing-format-attribute -Wstrict-aliasing=2 -Winit-self -Wunsafe-loop-optimizations -Wdeclaration-after-statement -Wold-style-definition -Wno-missing-field-initializers -Wno-unused-parameter -Wno-attributes -Wno-long-long -Winline -fno-strict-aliasing ----end-----manual-------