[DRE-maint] Bug#1075475: ruby-rdiscount: ftbfs with GCC-14

[Matthias Klose]

Package: src:ruby-rdiscount
Version: 2.1.8-3
Severity: important
Tags: sid trixie
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-14

[This bug is targeted to the upcoming trixie release]

Please keep this issue open in the bug tracker for the package it
was filed for.  If a fix in another package is required, please
file a bug for the other package (or clone), and add a block in this
package. Please keep the issue open until the package can be built in
a follow-up test rebuild.

The package fails to build in a test rebuild on at least amd64 with
gcc-14/g++-14, but succeeds to build with gcc-13/g++-13. The
severity of this report will be raised before the trixie release.

The full build log can be found at:
http://qa-logs.debian.net/2024/07/01/ruby-rdiscount_2.1.8-3_unstable_gccexp.log
The last lines of the build log are at the end of this report.

To build with GCC 14, either set CC=gcc-14 CXX=g++-14 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++ 

Common build failures are new warnings resulting in build failures with
-Werror turned on, or new/dropped symbols in Debian symbols files.
For other C/C++ related build failures see the porting guide at
http://gcc.gnu.org/gcc-14/porting_to.html

[...]
LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2   -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -fPIC   -c conftest.c"
conftest.c:7:5: error: size of array ‘conftest_const’ is negative
    7 | int conftest_const[(sizeof((*rbcv_ptr_)) < 0) ? 1 : -1];
      |     ^~~~~~~~~~~~~~
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: typedef unsigned int rbcv_typedef_;
4: rbcv_typedef_ *rbcv_ptr_;
5: 
6: /*top*/
7: int conftest_const[(sizeof((*rbcv_ptr_)) < 0) ? 1 : -1];
/* end */

LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2   -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -fPIC conftest.c  -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed    -lmarkdown  -lruby-3.1  -lm  -lc"
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: typedef unsigned int rbcv_typedef_;
 4: rbcv_typedef_ *rbcv_ptr_;
 5: 
 6: #include <stdio.h>
 7: /*top*/
 8: typedef unsigned
 9: #ifdef PRI_LL_PREFIX
10: #define PRI_CONFTEST_PREFIX PRI_LL_PREFIX
11: LONG_LONG
12: #else
13: #define PRI_CONFTEST_PREFIX "l"
14: long
15: #endif
16: conftest_type;
17: conftest_type conftest_const = (conftest_type)(sizeof((*rbcv_ptr_)));
18: int main() {printf("%"PRI_CONFTEST_PREFIX"u\n", conftest_const); return 0;}
/* end */

LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu ./conftest |
--------------------

/usr/lib/ruby/vendor_ruby/rubygems/ext/builder.rb:119:in `run': make failed, exit code 2 (Gem::InstallError)
	from /usr/lib/ruby/vendor_ruby/rubygems/ext/builder.rb:53:in `block in make'
	from /usr/lib/ruby/vendor_ruby/rubygems/ext/builder.rb:45:in `each'
	from /usr/lib/ruby/vendor_ruby/rubygems/ext/builder.rb:45:in `make'
	from /usr/lib/ruby/vendor_ruby/rubygems/ext/ext_conf_builder.rb:42:in `build'
	from /usr/lib/ruby/vendor_ruby/gem2deb/extension_builder.rb:81:in `block in build_and_install'
	from /usr/lib/ruby/vendor_ruby/gem2deb/extension_builder.rb:71:in `chdir'
	from /usr/lib/ruby/vendor_ruby/gem2deb/extension_builder.rb:71:in `build_and_install'
	from /usr/lib/ruby/vendor_ruby/gem2deb/extension_builder.rb:115:in `block in build_all_extensions'
	from /usr/lib/ruby/vendor_ruby/gem2deb/extension_builder.rb:112:in `each'
	from /usr/lib/ruby/vendor_ruby/gem2deb/extension_builder.rb:112:in `build_all_extensions'
	from /usr/lib/ruby/vendor_ruby/gem2deb/extension_builder.rb:128:in `<main>'
~~~~~~~~~~~~~~~~~~~~~ ↑ mkmf.log ~~~~~~~~~~~~~~~~~~~~~
/usr/lib/ruby/vendor_ruby/gem2deb.rb:52:in `run': /usr/bin/ruby3.1 /usr/lib/ruby/vendor_ruby/gem2deb/extension_builder.rb /<<PKGBUILDDIR>> debian/ruby-rdiscount (Gem2Deb::CommandFailed)
	from /usr/lib/ruby/vendor_ruby/gem2deb.rb:64:in `block in run_ruby'
	from /usr/lib/ruby/vendor_ruby/gem2deb.rb:87:in `maybe_crossbuild'
	from /usr/lib/ruby/vendor_ruby/gem2deb.rb:63:in `run_ruby'
	from /usr/lib/ruby/vendor_ruby/gem2deb/installer.rb:57:in `block in install_files_and_build_extensions'
	from /usr/lib/ruby/vendor_ruby/gem2deb/installer.rb:54:in `each'
	from /usr/lib/ruby/vendor_ruby/gem2deb/installer.rb:54:in `install_files_and_build_extensions'
	from /usr/lib/ruby/vendor_ruby/gem2deb/installer.rb:28:in `build'
	from /usr/lib/ruby/vendor_ruby/gem2deb/dh_ruby.rb:54:in `block in install'
	from /usr/lib/ruby/vendor_ruby/gem2deb/dh_ruby.rb:52:in `each'
	from /usr/lib/ruby/vendor_ruby/gem2deb/dh_ruby.rb:52:in `install'
	from /usr/lib/ruby/vendor_ruby/gem2deb/dh_ruby.rb:163:in `install'
	from /usr/bin/dh_ruby:89:in `<main>'
dh_auto_install: error: dh_ruby --install /<<PKGBUILDDIR>>/debian/ruby-rdiscount returned exit code 1
make: *** [debian/rules:15: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2