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libtool problem with --whole-archive/--no-whole-archive


From: Venkatesh Vivekanandan
Subject: libtool problem with --whole-archive/--no-whole-archive
Date: Wed, 26 Nov 2014 11:20:50 +0530

Hi All,

For our project we use automake/libtool

automake (GNU automake) 1.14.1
libtool (GNU libtool) 2.4.2
autoconf (GNU Autoconf) 2.69

We have,
platform/targetA/Makefile.am
platform/targetB/Makefile.am
example/*/Makefile.am

We wanted to link an external lib wrapped around --whole-archive/--no-whole-archive with the example application as given below,

platform/targetA/Makefile.am

LIBS += -Wl,--whole-archive
LIBS += -lmyextlib
LIBS += -Wl,--no-whole-archive

Problem is, platform linker command doesn't have --whole-archive/--no-whole-archive around the lib. Instead it comes later in the command line.

gcc:
-Wl,--whole-archive -lmyextlib -ldl -Wl,--no-whole-archive
libtool link:
-lrt -lcrypto -lmyextlib -ldl  -pthread -O2 -pthread -Wl,--whole-archive -Wl,--no-whole-archive

example/*/Makefile.am
When compiling the example app, linker command line just has -lmyextlib and doesn't have --whole-archive/--no-whole-archive at all.

How to propogate the --whole-archive/--no-whole-archive all the way down to example app linking?. Importantly, it should be around the -lmyextlib. I can make changes only at platform/targetA/Makefile.am as example/* is common across all other platforms.

Note: Tried libtool's suggestion of -Wl,'-whole-archive -lfoo -no-whole-archive' as mentioned in 
lists.gnu.org/archive/html/libtool/2002-05/msg00043.html but that didn't work.

Am I missing something here? What I am trying to achieve is completely wrong?

Thanks,
Venkatesh.

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