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From: "Nasser M. Abbasi" <nma@12000.org>
Newsgroups: comp.lang.ada
Subject: anyone seen this link error trying to link Ada program with blas
 and lapack? "cannot find -lgnalasup"
Date: Fri, 15 Oct 2010 22:46:34 -0700
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Date: 2010-10-15T22:46:34-07:00
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Hello;

I've send this email to the cygwin mailing list.

I thought I check here also.

I am trying to build an Ada file which has to be linked to blas and 
lapack as it uses the new Ada 2005 Solve() of linear system function.

The link problem is on cygwin. I think it is a gcc installation issue 
may be.

"It seems there is a library missing in the system. Did a search on 
this, but not able to find anything.

$ uname -a
CYGWIN_NT-6.1-WOW64 me-PC 1.7.7(0.230/5/3) 2010-08-31 09:58 i686 Cygwin

$ gcc --version
gcc (GCC) 4.3.4 20090804 (release) 1

$ gnatmake main.adb -largs -L/usr/lib  -lgnala -llapack -lblas
gnatbind -x main.ali
gnatlink main.ali -L/usr/lib -lgnala -llapack -lblas
/usr/lib/gcc/i686-pc-cygwin/4.3.4/../../../../i686-pc-cygwin/bin/ld:
cannot find -lgnalasup
collect2: ld returned 1 exit status
gnatlink: error when calling /usr/bin/gcc.exe
gnatmake: *** link failed.

When I copy the source file (the Ada file) to a linux system, with 
ubuntu 10.10 (linux 2.6.35-22) running gcc 4.4.5, the same command above 
works with no problem. no link error.
"

The blas and lapack libraries should come with the system normally, but 
sometime they do not.  On cygwin, they are there. On Ubuntu I had to 
install them afterwords (easy with the package manager).

The Ada source file is just one file. If someone wants to try the above 
gnatmake command on my file, here it is:

http://12000.org/tmp/AAA/main.adb

Need to use the above command to build it, which is:

gnatmake main.adb -largs -L/usr/lib  -lgnala -llapack -lblas

It does nothing now, just wanted first to see if it builds oK.

thanks
--Nasser