Force DT_RPATH for --enable-hardcoded-path-in-tests

On Fedora 40/x86-64, linker enables --enable-new-dtags by default which
generates DT_RUNPATH instead of DT_RPATH.  Unlike DT_RPATH, DT_RUNPATH
only applies to DT_NEEDED entries in the executable and doesn't applies
to DT_NEEDED entries in shared libraries which are loaded via DT_NEEDED
entries in the executable.  Some glibc tests have libstdc++.so.6 in
DT_NEEDED, which has libm.so.6 in DT_NEEDED.  When DT_RUNPATH is generated,
/lib64/libm.so.6 is loaded for such tests.  If the newly built glibc is
older than glibc 2.36, these tests fail with

assert/tst-assert-c++: /export/build/gnu/tools-build/glibc-gitlab-release/build-x86_64-linux/libc.so.6: version `GLIBC_2.36' not found (required by /lib64/libm.so.6)
assert/tst-assert-c++: /export/build/gnu/tools-build/glibc-gitlab-release/build-x86_64-linux/libc.so.6: version `GLIBC_ABI_DT_RELR' not found (required by /lib64/libm.so.6)

Pass -Wl,--disable-new-dtags to linker when building glibc tests with
--enable-hardcoded-path-in-tests.  This fixes BZ #31719.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>

diff --git a/Makeconfig b/Makeconfig
index 61ff1d0d9bdc2f5c74b80e28a3c70dfc54f75eba..59e21d4c82b7ec696154d12aaaecd72e9bae6f92 100644 (file)
--- a/Makeconfig
+++ b/Makeconfig
@@ -607,10 +607,13 @@ link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
 # before the expansion of LDLIBS-* variables).
 
 # Tests use -Wl,-rpath instead of -Wl,-rpath-link for
-# build-hardcoded-path-in-tests.
+# build-hardcoded-path-in-tests.  Add -Wl,--disable-new-dtags to force
+# DT_RPATH instead of DT_RUNPATH which only applies to DT_NEEDED entries
+# in the executable and doesn't applies to DT_NEEDED entries in shared
+# libraries which are loaded via DT_NEEDED entries in the executable.
 ifeq (yes,$(build-hardcoded-path-in-tests))
-link-libc-tests-rpath-link = $(link-libc-rpath)
-link-test-modules-rpath-link = $(link-libc-rpath)
+link-libc-tests-rpath-link = $(link-libc-rpath) -Wl,--disable-new-dtags
+link-test-modules-rpath-link = $(link-libc-rpath) -Wl,--disable-new-dtags
 else
 link-libc-tests-rpath-link = $(link-libc-rpath-link)
 link-test-modules-rpath-link =