[glibc/release/2.38/master] Force DT_RPATH for --enable-hardcoded-path-in-tests

[glibc/release/2.38/master] Force DT_RPATH for --enable-hardcoded-path-in-tests

[H.J. Lu]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=249646f12b08f3dbd9a8e8b8021e5c0e3a0b7e1e

commit 249646f12b08f3dbd9a8e8b8021e5c0e3a0b7e1e
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Thu May 9 20:07:01 2024 -0700

    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>
    (cherry picked from commit 2dcaf70643710e22f92a351e36e3cff8b48c60dc)

Diff:
---
 Makeconfig | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Makeconfig b/Makeconfig
index 77d7fd14df..3f8acff459 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -586,10 +586,13 @@ 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 =