Is there a way to obtain the version of liblapack.a? - lapack

Question

I installed lapack 3.4.2 and 3.5.0 by compiling them with cmake. In my installation dir of lapack 3.5.0 I find a file ./pkgconfig/lapack.pc saying Version: 3.4.2. So I'm not sure I really installed lapack 3.5.0 there.
Is there a way to obtain the version of lapack directly form the lib liblapack.a (or LAPACK.lib under Windows) ? For example from a routine in the library or with a specific tool ?

Answer 1

The lapack function ilaver() is made for you !
Its prototype is self-explaining :
subroutine ilaver ( integer VERS_MAJOR,
integer VERS_MINOR,
integer VERS_PATCH
)
Here are two programs demonstrating how to use it :
in a fortran program, complied by gcc main.f90 -o main -llapack
PROGRAM VER
IMPLICIT NONE
INTEGER major, minor, patch
CALL ilaver( major,minor, patch )
WRITE(*,*) "LAPACK ",major,".",minor,".",patch
END PROGRAM VER
In a c program, compiled by gcc main.c -o main -llapack
#include <stdio.h>
extern ilaver_(int* major,int* minor,int* patch);
int main()
{
int major=0;
int minor=0;
int patch=0;
ilaver_(&major,&minor,&patch);
printf("lapack %d.%d.%d\n",major,minor,patch);
}

Answer 2

If you don't want to compile anything, you can do this in Python:
ATL-MBP-MAC4:~ dmcdonald$ python3
Python 3.4.2 (default, Jan 29 2015, 06:34:22)
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.56)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from ctypes import *
>>> from ctypes.util import *
>>> lapack = CDLL(find_library("lapack"))
>>> major, minor, patch = c_int(), c_int(), c_int()
>>> lapack.ilaver(byref(major), byref(minor), byref(patch))
0
>>> print("{0}.{1}.{2}".format(major.value, minor.value, patch.value))
3.2.1