#7203: prereq-0.4 does not exit if CC is not gcc, but CXX is g++
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Reporter: drkirkby | Owner: tbd
Type: defect | Status: new
Priority: major | Milestone: sage-4.1.3
Component: build | Keywords:
Work_issues: | Author:
Reviewer: | Merged:
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One of changes made in my recent update of prereq (#7021) from 0.3 to 0.4
was to exit when there was a mix of GNU and non-GNU compilers.
Whilst this works if you have a GNU C compiler and a non-GNU C++ compiler,
it does '''not''' work if you have a non-GNU C compiler and a GNU C++
compiler. This is a bug, and is entirely my fault.
Basically the testing for mixing of compilers happens in configure.ac
something like this:
{{{
if test x$GCC = xyes
then
# Check if C++ compiler is g++. If not, there is a problem.
# as mixing GNU and non-GNU compilers is likely to cause problems.
if test x$GXX != xyes
then
AC_MSG_WARN([You are trying to use gcc but not g++])
AC_MSG_ERROR([The mixing of GNU and non-GNU compilers is not
permitted])
fi
}}}
There is no corresponding test if x$GXX (the C++ compiler) is GNU. (Yes,
GXX is correct, its not a mistake/)
I will also need to fix #7156, which is a minor portability issue with
prereq.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7203>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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