Re: .la file dependency_libs dropping sole -lm dependency

[Ileana Dumitrescu]

On 31/01/2024 20:57, Bob Friesenhahn wrote:

On Wed, 31 Jan 2024, Bob Friesenhahn wrote:

bin/bash ./libtool  --tag=CXX --mode=link g++-10 -no-undefined -export-symbols-regex ".*"  -version-info 27:4:24 -L/usr/local/lib -Wl,-rpath,/usr/local/lib -o magick/libGraphicsMagick.la -rpath /usr/local/lib [ list of .lo files ] -lm An I misunderstanding something, or is this a bug in libtool?  What am I missing in order for this to work?

   # Libraries that this one depends upon.
   dependency_libs=' -L/usr/local/lib'




   # Libraries that this one depends upon.
   dependency_libs=' -L/usr/local/lib -ljpeg'




   # Libraries that this one depends upon.
   dependency_libs=' -L/usr/local/lib'



This same thing happens under Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.

Bob

As further information on this issue, I tried using '-lm -lm' and there was no change in the results: Then I tried using '-ljpeg -lm' and I see that the -ljpeg gets added, but not the -lm: and then I tried using '-lm -jpeg', and I see that there are again no dependency libraries at all: After testing various permutations, I see that anything starting with '-lm' gets removed in entirety.

Well this definitely looks like a bug. I can't imagine any reason that
would be correct. I'm trying to reproduce it now, with GraphicsMagick.

I filed a bug [1]. Thanks for the detailed report!

[1] https://debbugs.gnu.org/cgi/bugreport.cgi?bug=68856

--
Ileana Dumitrescu

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