> 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.adbs-tpopsp.adbs-taspri.ads + $(TRASYM_DWARF_UNIX_PAIRS) \
> + s-tsmona.adb$(ATOMICS_TARGET_PAIRS) \
>$(X86_64_TARGET_PAIRS) \
> + $(GNATRTL_128BIT_PAIRS) \
>system.ads
> The addition of s-tsmona.adb reference to dladdr, however not setting MISCLIB to -ldl as on other
> architectures
>
> Proposed patch:
>
>
> PR ada/107475
> * Makefile.rtl: Set MISCLIB for x86_64-linux-gnux32.
>
>
> --- a/gcc/ada/Makefile.rtl
> +++ b/gcc/ada/Makefile.rtl
> @@ -2584,6 +2584,7 @@ ifeq ($(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?
Yes, thanks.