This was introduced with the fix and backports of PR103530 on
x86_64-linux-gnux32 with older glibc versions (checked with 2.31), where dladdr
is still in the libdl.so library, and not included in libc.so as in newer glibc
versions.
Linking of libgnat.so fails with
[...]
/usr/x86_64-linux-gnux32/bin/ld: s-trasym.o: in function
`system__traceback__symbolic__module_na
me__getXnn':
collect2: error: ld returned 1 exit status
make[8]: *** [gcc-interface/Makefile:677: gnatlib-shared-default] Error 1
https://gcc.gnu.org/git/?p=gcc.git;a=patch;h=9d6c63ba490ec92245f04b5cbafc56abd28e8d22
-- a/gcc/ada/Makefile.rtl
+++ b/gcc/ada/Makefile.rtl
@@ -2650,13 +2650,18 @@ ifeq ($(strip $(filter-out %x32 linux%,$(target_cpu)
$(target_os))),)
s-tasinf.adb<libgnarl/s-tasinf__linux.adb \
s-tpopsp.adb<libgnarl/s-tpopsp__tls.adb \
s-taspri.ads<libgnarl/s-taspri__posix.ads \
+ $(TRASYM_DWARF_UNIX_PAIRS) \
+ s-tsmona.adb<libgnat/s-tsmona__linux.adb \
$(ATOMICS_TARGET_PAIRS) \
$(X86_64_TARGET_PAIRS) \
+ $(GNATRTL_128BIT_PAIRS) \
system.ads<libgnat/system-linux-x86.ads
The addition of s-tsmona.adb<libgnat/s-tsmona__linux.adb pulls in the reference
to dladdr, however not setting MISCLIB to -ldl as on other architectures
Proposed patch:
PR ada/107475
* Makefile.rtl: Set MISCLIB for x86_64-linux-gnux32.
--- a/gcc/ada/Makefile.rtl
+++ b/gcc/ada/Makefile.rtl
@@ -2584,6 +2584,7 @@ ifeq ($(strip $(filter-out %x32 linux%,$(target_cpu)
$(target_os))),)
EXTRA_GNATRTL_TASKING_OBJS=s-linux.o a-exetim.o
EH_MECHANISM=-gcc
THREADSLIB=-lpthread -lrt
+ MISCLIB = -ldl
GNATLIB_SHARED=gnatlib-shared-dual
GMEM_LIB = gmemlib
LIBRARY_VERSION := $(LIB_VERSION)
Ok for the trunk and the branches?
Matthias
