When building, say, glibc 2.31 using a compiler that's itself linked
against 2.33, linking fails with:

  gcc -Wl,-rpath-link=/tmp/guix-build-glibc-2.31.drv-0/build:/tmp/guix-build-glibc-2.31.drv-0/build/math:/tmp/guix-build-glibc-2.31.drv-0/build/elf:/tmp/guix-build-glibc-2.31.drv-0/build/dlfcn:/tmp/guix-build-glibc-2.31.drv-0/build/nss:/tmp/guix-build-glibc-2.31.drv-0/build/nis:/tmp/guix-build-glibc-2.31.drv-0/build/rt:/tmp/guix-build-glibc-2.31.drv-0/build/resolv:/tmp/guix-build-glibc-2.31.drv-0/build/mathvec:/tmp/guix-build-glibc-2.31.drv-0/build/support:/tmp/guix-build-glibc-2.31.drv-0/build/crypt:/tmp/guix-build-glibc-2.31.drv-0/build/nptl -nostdlib -nostartfiles -o /tmp/guix-build-glibc-2.31.drv-0/build/support/links-dso-program    -Wl,-z,combreloc -Wl,-z,relro -Wl,--hash-style=both /tmp/guix-build-glibc-2.31.drv-0/build/csu/crt1.o /tmp/guix-build-glibc-2.31.drv-0/build/csu/crti.o `gcc  --print-file-name=crtbegin.o` /tmp/guix-build-glibc-2.31.drv-0/build/support/links-dso-program.o -lstdc++ -lgcc -lgcc_s  -Wl,-dynamic-linker=/gnu/store/...-glibc-2.31/lib/ld-linux-x86-64.so.2  /tmp/guix-build-glibc-2.31.drv-0/build/libc.so.6 /tmp/guix-build-glibc-2.31.drv-0/build/libc_nonshared.a -Wl,--as-needed /tmp/guix-build-glibc-2.31.drv-0/build/elf/ld.so -Wl,--no-as-needed -lgcc  `gcc  --print-file-name=crtend.o` /tmp/guix-build-glibc-2.31.drv-0/build/csu/crtn.o
  ld: /gnu/store/...-gcc-10.3.0-lib/lib/gcc/x86_64-unknown-linux-gnu/10.3.0/../../../libstdc++.so: undefined reference to `fstat64@GLIBC_2.33'
  ld: /gnu/store/...-gcc-10.3.0-lib/lib/gcc/x86_64-unknown-linux-gnu/10.3.0/../../../libstdc++.so: undefined reference to `lstat@GLIBC_2.33'
  ld: /gnu/store/...-gcc-10.3.0-lib/lib/gcc/x86_64-unknown-linux-gnu/10.3.0/../../../libstdc++.so: undefined reference to `stat@GLIBC_2.33'
  collect2: error: ld returned 1 exit status

This is unsurprising given that libstdc++.so here is linked against 2.33,
whereas libc.so.6 here is 2.31.

This patch works around it by not building the offending program.

diff --git a/support/Makefile b/support/Makefile
index bb9889ef..6614943b 100644
--- a/support/Makefile
+++ b/support/Makefile
@@ -210,12 +210,7 @@ CFLAGS-support_paths.c = \
 # -fexcess-precision=standard.
 CFLAGS-timespec.c += -fexcess-precision=standard
 
-ifeq (,$(CXX))
 LINKS_DSO_PROGRAM = links-dso-program-c
-else
-LINKS_DSO_PROGRAM = links-dso-program
-LDLIBS-links-dso-program = -lstdc++ -lgcc -lgcc_s $(libunwind)
-endif
 
 ifeq (yes,$(have-selinux))
 LDLIBS-$(LINKS_DSO_PROGRAM) += -lselinux
kages</a>/<a href='/guix/log/gnu/packages/browser-extensions.scm?id=7c06b0abfc0453c361aafaeaf1dda1678b2b744f&amp;showmsg=1'>browser-extensions.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/browser-extensions.scm?id=7c06b0abfc0453c361aafaeaf1dda1678b2b744f'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2022-11-12 03:23:05 +0100'>2022-11-12</span></td><td class='logsubject'><a href='/guix/commit/gnu/packages/browser-extensions.scm?id=8a261de34c773ab8f374b849e608dab5c434681f'>gnu: uBlock Origin: Update to 1.45.2.</a></td><td>Marius Bakke</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/packages/browser-extensions.scm (ublock-origin): Update to 1.45.2.


</td></tr>
<tr class='logheader'><td><span title='2022-09-07 22:02:43 +0200'>2022-09-07</span></td><td class='logsubject'><a href='/guix/commit/gnu/packages/browser-extensions.scm?id=b45a44eaad890f31d9418dbb8cb14e3ee1d83c19'>gnu: uBlock Origin: Update to 1.44.2.</a></td><td>Marius Bakke</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/packages/browser-extensions.scm (ublock-origin): Update to 1.44.2.


</td></tr>
<tr class='logheader'><td><span title='2022-08-19 19:22:43 +0200'>2022-08-19</span></td><td class='logsubject'><a href='/guix/commit/gnu/packages/browser-extensions.scm?id=712b931d5064f51f834c55a45f2dda4e934e72c4'>gnu: uBlock Origin: Update to 1.44.0.</a></td><td>Marius Bakke</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/packages/browser-extensions.scm (ublock-origin): Update to 1.44.0.


</td></tr>
<tr class='logheader'><td><span title='2022-06-13 00:44:12 +0200'>2022-06-13</span></td><td class='logsubject'><a href='/guix/commit/gnu/packages/browser-extensions.scm?id=d3d00b1b4f2875675999919fa7e892c36bfff4c6'>gnu: uBlock Origin: Update to 1.43.0.</a></td><td>Marius Bakke</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/packages/browser-extensions.scm (ublock-origin): Update to 1.43.0.


</td></tr>


* guix/records.scm (match-record-inner): Add support for the new syntax.
* tests/records.scm ("match-record, simple"): Add a simple test case for the
new syntax.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;


</td></tr>
<tr class='logheader'><td><span title='2022-12-02 00:02:12 +0100'>2022-12-02</span></td><td class='logsubject'><a href='/guix/commit/tests/records.scm?id=7c1161dba4c8930d3a500a72ccaaaf50df73f466'>records: 'match-record' checks fields at macro-expansion time.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
This allows 'match-record' to be more efficient (field offsets are
computed at compilation time) and to report unknown fields at
macro-expansion time.

* guix/records.scm (map-fields): New macro.
(define-record-type*)[rtd-identifier]: New procedure.
Define TYPE as a macro and use a separate identifier for the RTD.
(lookup-field, match-record-inner): New macros.
(match-record): Rewrite in terms of 'match-error-inner'.
* tests/records.scm ("match-record, simple")
("match-record, unknown field"): New tests.
* gnu/services/cuirass.scm (cuirass-shepherd-service): Rename 'log-file'
local variable to 'main-log-file'.
* gnu/services/getmail.scm (serialize-getmail-configuration-file): Move
after &lt;getmail-configuration-file&gt; definition.


</td></tr>