On Tue, Jun 24, 2025 at 12:19:47PM -0500, Chris Adams wrote:
> Once upon a time, Richard W.M. Jones <[email protected]> said:
> > To make the discussion concrete, could you grab a list of the actual
> > libraries that we're talking about here? I'm interested in how hard
> > it would be to adapt them to cross compilation as Dan mentioned upthread.
>
> Just looking at a running copy of the Steam client, I see libs loaded
> from a whole lot of packages. I expect that some are loaded by others,
> like I don't expect steam is actually using lm_sensors-libs itself.
>
> NetworkManager-libnm
> atk
> bzip2-libs
Thanks! It's a lot of libraries. I picked bzip2 at random as it's
relatively simple and modified it so it cross-compiled to a 32 bit
library. The diff to the spec is attached.
Obviously this could either be done as a new, separate package, or as
a subpackage of the existing bzip2 package. (For mingw we're mixing
both approaches.)
RPM complains about:
Macro expanded in comment on line 10: %{version}/%{name}-%{version}.tar.gz
Binaries arch (1) not matching the package arch (2).
Binaries arch (1) not matching the package arch (2).
I couldn't use 'BuildArch: i686' as I expected. Apparently only
'BuildArch: noarch' works. But surely this could be fixed somehow.
Cross-compiling _all_ of the packages in this way is going to be a
fair bit of work.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
Fedora Windows cross-compiler. Compile Windows programs, test, and
build Windows installers. Over 100 libraries supported.
http://fedoraproject.org/wiki/MinGW
diff --git a/bzip2.spec b/bzip2.spec
index ca1b861..7a0baab 100644
--- a/bzip2.spec
+++ b/bzip2.spec
@@ -1,4 +1,5 @@
%global library_version 1.0.8
+%global _libdir32 %{_prefix}/lib
Summary: File compression utility
Name: bzip2
@@ -64,28 +65,28 @@ Static libraries for applications using the bzip2
compression format.
%patch -P3 -p2
cp -a %{SOURCE1} .
-sed -i "s|^libdir=|libdir=%{_libdir}|" bzip2.pc
+sed -i "s|^libdir=|libdir=%{_libdir32}|" bzip2.pc
%build
%make_build -f Makefile-libbz2_so CC="%{__cc}" AR="%{__ar}" RANLIB="ranlib" \
- CFLAGS="$RPM_OPT_FLAGS -D_FILE_OFFSET_BITS=64 -fpic -fPIC" \
+ CFLAGS="$RPM_OPT_FLAGS -D_FILE_OFFSET_BITS=64 -fpic -fPIC -m32" \
LDFLAGS="%{__global_ldflags}" \
all
rm -f *.o
%make_build CC="%{__cc}" AR="%{__ar}" RANLIB="ranlib" \
- CFLAGS="$RPM_OPT_FLAGS -D_FILE_OFFSET_BITS=64" \
+ CFLAGS="$RPM_OPT_FLAGS -D_FILE_OFFSET_BITS=64 -m32" \
LDFLAGS="%{__global_ldflags}" \
all
%install
chmod 644 bzlib.h
-mkdir -p
$RPM_BUILD_ROOT{%{_bindir},%{_mandir}/man1,%{_libdir}/pkgconfig,%{_includedir}}
+mkdir -p
$RPM_BUILD_ROOT{%{_bindir},%{_mandir}/man1,%{_libdir32}/pkgconfig,%{_includedir}}
cp -p bzlib.h $RPM_BUILD_ROOT%{_includedir}
-install -m 755 libbz2.so.%{library_version} $RPM_BUILD_ROOT%{_libdir}
-install -m 644 libbz2.a $RPM_BUILD_ROOT%{_libdir}
-install -m 644 bzip2.pc $RPM_BUILD_ROOT%{_libdir}/pkgconfig/bzip2.pc
+install -m 755 libbz2.so.%{library_version} $RPM_BUILD_ROOT%{_libdir32}
+install -m 644 libbz2.a $RPM_BUILD_ROOT%{_libdir32}
+install -m 644 bzip2.pc $RPM_BUILD_ROOT%{_libdir32}/pkgconfig/bzip2.pc
install -m 755 bzip2-shared $RPM_BUILD_ROOT%{_bindir}/bzip2
install -m 755 bzip2recover bzgrep bzdiff bzmore $RPM_BUILD_ROOT%{_bindir}/
cp -p bzip2.1 bzdiff.1 bzgrep.1 bzmore.1 $RPM_BUILD_ROOT%{_mandir}/man1/
@@ -95,8 +96,8 @@ ln -s bzdiff $RPM_BUILD_ROOT%{_bindir}/bzcmp
ln -s bzmore $RPM_BUILD_ROOT%{_bindir}/bzless
ln -s bzgrep $RPM_BUILD_ROOT%{_bindir}/bzegrep
ln -s bzgrep $RPM_BUILD_ROOT%{_bindir}/bzfgrep
-ln -s libbz2.so.%{library_version} $RPM_BUILD_ROOT%{_libdir}/libbz2.so.1
-ln -s libbz2.so.1 $RPM_BUILD_ROOT%{_libdir}/libbz2.so
+ln -s libbz2.so.%{library_version} $RPM_BUILD_ROOT%{_libdir32}/libbz2.so.1
+ln -s libbz2.so.1 $RPM_BUILD_ROOT%{_libdir32}/libbz2.so
ln -s bzip2.1 $RPM_BUILD_ROOT%{_mandir}/man1/bzip2recover.1
ln -s bzip2.1 $RPM_BUILD_ROOT%{_mandir}/man1/bunzip2.1
ln -s bzip2.1 $RPM_BUILD_ROOT%{_mandir}/man1/bzcat.1
@@ -115,17 +116,17 @@ ln -s bzgrep.1 $RPM_BUILD_ROOT%{_mandir}/man1/bzfgrep.1
%files libs
%license LICENSE
-%{_libdir}/libbz2.so.1*
+%{_libdir32}/libbz2.so.1*
%files static
%license LICENSE
-%{_libdir}/libbz2.a
+%{_libdir32}/libbz2.a
%files devel
%doc manual.html manual.pdf
%{_includedir}/*
-%{_libdir}/*.so
-%{_libdir}/pkgconfig/bzip2.pc
+%{_libdir32}/*.so
+%{_libdir32}/pkgconfig/bzip2.pc
%changelog
* Thu Jan 16 2025 Fedora Release Engineering <[email protected]> -
1.0.8-20
--
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