[cairo] fatal error: pthread.h: No such file or directory

[YuGiOhJCJ Mailing-List]

This command line is very important when I am cross-compiling:
PKG_CONFIG_PATH="/usr/i686-pc-mingw32/lib/pkgconfig"

Without this command line, the "pkg-config" program will use this path "/usr/lib/pkgconfig" by default.
The "/usr/lib/pkgconfig" path contains *.pc files that are useful when you do not cross-compile.

See the difference of the content for these *.pc files:
/usr/lib/pkgconfig/sdl.pc:
 [...]
 prefix=/usr
 [...]
 Libs: -L${libdir} -Wl,-rpath,${libdir} -lSDL  -lpthread
 [...]
/usr/i686-pc-mingw32/lib/pkgconfig/sdl.pc:
 [...]
 prefix=/usr/i686-pc-mingw32
 [...]
 Libs: -L${libdir}  -lmingw32 -lSDLmain -lSDL  -mwindows
 [...]

You can clearly see here that the prefix and libraries information in these files matches to the linux compiler when the path is "/usr/lib/pkgconfig" whereas they matches to the (linux to windows) cross-compiler when the path is "/usr/i686-pc-mingw32/lib/pkgconfig".
So, that is why I am using this command line before cross-compiling.

Indeed you are right, the path of glib is not correct as we can see in the error messages.
I think it is because glib is not at all installed for my cross-compiler.
If you check the list of libraries I give in the previous e-mail, you will see that glib is not available.
What is strange is that if glib is a requirement for cross-compiling cairo, why the configure script does not tell me that it is missing for my cross-compiler?
Also, why the configure script choose the "/usr/include/glib-2.0" path for the glib headers?
Do you think that if I cross-compile glib, the configure script will find it and will use the correct path automatically and solve my problem?

On Sun, 05 Jul 2015 11:16:09 +0900
suzuki toshiya <mpsuzuki at hiroshima-u.ac.jp> wrote:

> > That is how I am doing to cross-compile cairo-1.14.2:
> > $ PKG_CONFIG_PATH="/usr/i686-pc-mingw32/lib/pkgconfig"
> 
> Who told you to do such? Clearly it does not fit to
> the cross building, as you see that GLib header files
> for the building system are included, like,
> 
> > In file included from /usr/include/glib-2.0/glib.h:107:0,
> >                  from /usr/include/glib-2.0/gobject/gbinding.h:28,
> >                  from /usr/include/glib-2.0/glib-object.h:23,
> 
> YuGiOhJCJ Mailing-List wrote:
> > Hello,
> > 
> > I try to cross-compile cairo-1.14.2 (because it is a dependency for gtk+-2.24.20).
> > I do this with my cross-compiler (linux to windows) built with mingw32 and including all these libraries:
> > binutils-2.24.51
> > bzip2-1.0.6
> > expat-2.1.0
> > fontconfig-2.11.1
> > freeglut-2.8.1
> > freetype-2.4.10
> > gcc-4.9.1
> > gettext-0.18.2.1
> > gtk+-1.2.10
> > libffi-3.0.13
> > libiconv-1.14
> > libxml2-2.9.2
> > libxmp-4.2.8
> > mesa-9.1.3
> > mingwrt-3.20.2
> > sdl-1.2.15
> > sdl-mixer-1.2.12
> > sdl-net-1.2.8
> > sdl-ttf-2.0.11
> > smpeg-r389
> > w32api-3.17.2
> > xmp-4.0.8
> > zlib-1.2.8
> > 
> > That is how I am doing to cross-compile cairo-1.14.2:
> > $ PKG_CONFIG_PATH="/usr/i686-pc-mingw32/lib/pkgconfig"
> > $ tar xvf cairo-1.14.2.tar.xz
> > $ cd cairo-1.14.2
> > $ ./configure --prefix=/usr/i686-pc-mingw32 --host=i686-pc-mingw32 --enable-win32 --enable-win32-font --disable-xlib --disable-xlib-xrender --disable-xcb --disable-xlib-xcb --disable-xcb-shm --disable-pthread --without-x
> > $ make
> > [...]
> > make[4]: Entering directory `/tmp/build/cairo-1.14.2/util/cairo-gobject'
> >   CC       libcairo_gobject_la-cairo-gobject-enums.lo
> > In file included from /usr/include/glib-2.0/glib.h:107:0,
> >                  from /usr/include/glib-2.0/gobject/gbinding.h:28,
> >                  from /usr/include/glib-2.0/glib-object.h:23,
> >                  from cairo-gobject.h:44,
> >                  from cairo-gobject-enums.c:8:
> > /usr/include/glib-2.0/glib/deprecated/gthread.h:128:21: fatal error: pthread.h: No such file or directory
> >  #include <pthread.h>
> >                      ^
> > compilation terminated.
> > make[4]: *** [libcairo_gobject_la-cairo-gobject-enums.lo] Error 1
> > make[4]: Leaving directory `/tmp/build/cairo-1.14.2/util/cairo-gobject'
> > make[3]: *** [all-recursive] Error 1
> > make[3]: Leaving directory `/tmp/build/cairo-1.14.2/util'
> > make[2]: *** [all] Error 2
> > make[2]: Leaving directory `/tmp/build/cairo-1.14.2/util'
> > make[1]: *** [all-recursive] Error 1
> > make[1]: Leaving directory `/tmp/build/cairo-1.14.2'
> > make: *** [all] Error 2
> > 
> > That is the first time I can't cross compile a library with my cross-compiler.
> > I don't know exactly why it is looking for the "pthread.h" header because my cross-compiler is not supporting threads and because I have given the "--disable-pthread" option to the configure script.
> > 
> > When I am looking at the /tmp/build/cairo-1.14.2/util/cairo-gobject/Makefile file where the problem is found, I see this rule:
> > libcairo_gobject_la-cairo-gobject-enums.lo: cairo-gobject-enums.c
> > 	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libcairo_gobject_la_CFLAGS) $(CFLAGS) -MT libcairo_gobject_la-cairo-gobject-enums.lo -MD -MP -MF $(DEPDIR)/libcairo_gobject_la-cairo-gobject-enums.Tpo -c -o libcairo_gobject_la-cairo-gobject-enums.lo `test -f 'cairo-gobject-enums.c' || echo '$(srcdir)/'`cairo-gobject-enums.c
> > 	$(AM_V_at)$(am__mv) $(DEPDIR)/libcairo_gobject_la-cairo-gobject-enums.Tpo $(DEPDIR)/libcairo_gobject_la-cairo-gobject-enums.Plo
> > 
> > I think it is not normal that the "/usr/include/glib-2.0/glib/deprecated/gthread.h" file appears in the error message because this file is part of the headers available in my linux system.
> > As I am cross-compiling cairo for windows, I should not see that.
> > Maybe the problem is relative to libtool.
> > 
> > Any idea why I got this error message please?
> > 
> > Thank you.
> > Best regards.