[Bug 235751] Failure to init TLS variables with func ptr inside shared lib

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235751

Dennis Clarke <dclarke@blastwave.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Closed
         Resolution|---                         |Not A Bug

--- Comment #11 from Dennis Clarke <dclarke@blastwave.org> ---

This is entirely PEBKAC given that the second command issued
to LLVM/Clang also specified -shared and that is wrong.

titan$ uname -apKU 
FreeBSD titan 15.0-CURRENT FreeBSD 15.0-CURRENT #5 main-n274856-488660360a71:
Sat Jan 18 17:03:26 GMT 2025    
root@titan:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG amd64 amd64 1500030
1500030

titan$ echo $CC
/usr/bin/cc

titan$ $CC --version 
FreeBSD clang version 19.1.7 (https://github.com/llvm/llvm-project.git
llvmorg-19.1.7-0-gcd708029e0b2)
Target: x86_64-unknown-freebsd15.0
Thread model: posix
InstalledDir: /usr/bin
Build config: +assertions

titan$ $CC -std=iso9899:1999 -pedantic -pedantic-errors -m64 -g -O0
-fno-builtin -shared -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
-D_XOPEN_SOURCE=600 -D_REENTRANT -o t1.so -fPIC t1.c

        * * *  careful here to NOT use -shared * * *

titan$ $CC -std=iso9899:1999 -pedantic -pedantic-errors -m64 -g -O0
-fno-builtin -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_XOPEN_SOURCE=600
-D_REENTRANT -o foo t2.c t1.so


titan$ LD_LIBRARY_PATH=`pwd` ./foo
titan$ echo $?
42
titan$ 

    Well lo and behold.

    So this is a user error in that the -shared should NOT be there on
    the compile and link line : 

titan$ $CC -std=iso9899:1999 -pedantic -pedantic-errors -m64 -g -O0
-fno-builtin -shared -D_LARGEFILE64_SOUR
CE -D_FILE_OFFSET_BITS=64 -D_XOPEN_SOURCE=600 -D_REENTRANT -o foo t2.c t1.so

titan$ file foo
foo: ELF 64-bit LSB shared object, x86-64, version 1 (FreeBSD), dynamically
linked, for FreeBSD 15.0 (1500030), with debug_info, not stripped

titan$ LD_LIBRARY_PATH=`pwd` ./foo
Segmentation fault (core dumped)
titan$ 

Closing this as a dumb user error.

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