将基于gnulib的项目交叉编译到MinGW

Question

I am trying to cross-compile this project to MinGW.

The project uses autotools as the build system, and depends on libcurl , CUnit , Jansson and some gnulib modules.

I have all the dependancies compiled for x86_64-w64-mingw32 and installed under /home/user/mingw64

I run:

$ gnulib-tool --update
$ autoreconf -fi
$ CURL_CFLAGS="-I/home/user/mingw64/usr/local/include" \
CURL_LIBS="-L/home/user/mingw64/usr/local/lib -lcurl" \
JANSSON_CFLAGS="-I/home/user/mingw64/usr/local/include" \
JANSSON_LIBS="-L/home/user/mingw64/usr/local/lib -ljansson" \
CUNIT_CFLAGS="-I/home/user/mingw64/usr/local/include" \
CUNIT_LIBS="-L/home/user/mingw64/usr/local/lib -lcunit" \
./configure --host=x86_64-w64-mingw32
$ make

And I get this error:

make  all-recursive
make[1]: Entering directory '/home/user/projects/shill'
Making all in po
make[2]: Entering directory '/home/user/projects/shill/po'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/home/user/projects/shill/po'
Making all in lib
make[2]: Entering directory '/home/user/projects/shill/lib'
make[2]: *** No rule to make target 'lib/errno.h', needed by 'all'.  Stop.
make[2]: Leaving directory '/home/user/projects/shill/lib'
Makefile:1897: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/user/projects/shill'
Makefile:1429: recipe for target 'all' failed
make: *** [all] Error 2

errno.h is part of the gnulib modules. So I think that the problem comes from this section in the Makefile.am :

# Find gnulib headers.
ACLOCAL_AMFLAGS = -I m4

AM_CPPFLAGS = \
  -DLOCALEDIR='"$(localedir)"' \
  -Ilib -I$(top_srcdir)/lib \
  -Isrc -I$(top_srcdir)/src \

But I can't figure out the solution. I followed exactly the instructions described in the gnulib manual .

Answer 1

I managed to find a workaround for this issue. Apparently autotools aren't as easy as I thought they are.

1. I had to regenerate gnulib modules, this time specifying the --makefile-name parameter. ie.

    $ gnulib-tool ... --makefile-name=gnulib.mk ... 

2. I removed lib/Makefile from automake generated files in configure.ac . So instead of:

    dnl Put automake generated files results here AC_CONFIG_FILES([Makefile po/Makefile.in lib/Makefile]) 

   Now I have:

    dnl Put automake generated files results here AC_CONFIG_FILES([Makefile po/Makefile.in]) 

3. I removed lib form SUBDIRS in Makefile.am . ie. Instead of:

    # Subdirectories to descend into. SUBDIRS = po lib 

   I have:

    # Subdirectories to descend into. SUBDIRS = po 

4. I created a new file in lib directory called local.mk with this content:

    include lib/gnulib.mk # Allow "make distdir" to succeed before "make all" has run. dist-hook: $(noinst_LIBRARIES) .PHONY: dist-hook 

5. And included it in Makefile.am .

    include $(top_srcdir)/lib/local.mk 

6. Finally I had to run this command:

    $ ./build-aux/prefix-gnulib-mk --lib-name=libshill lib/gnulib.mk 

That was it.