How do I get autotools to compile with the Intel compiler?

Question

I want my code to compile with the Intel compiler(s) or with gcc/g++ depending on a configure argument. Is this possible? What do I need to put in my configure.ac and Makefile.am files to make this happen?

score 15 · Answer 1 · answered Feb 24 '11 at 05:47

15

I would do this:

AC_PROG_CC([icc gcc])

This will look for the compilers in the order specified, unless overridden with an argument to ./configure

$ ./confgure CC=gcc

answered Feb 24 '11 at 05:47

freedrull

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score 11 · Accepted Answer · answered Aug 15 '09 at 12:18

11

If you want to use a compiler other than gcc when you compile, pass 'CC=/path/to/compiler' as an argument to configure. (That is, run ./configure CC=/path. Do not use the form CC=/path ./configure.) If you want the default compiler to be something other than gcc, you can put

CC=${CC-/path/to/default/compiler}

in configure.ac before the invocation of AC_PROG_CC.

answered Aug 15 '09 at 12:18

William Pursell

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This is not a good approach. Use AC_PROG_CC as advised by freedrull instead. – William Pursell Jul 06 '16 at 12:57

score 4 · Answer 3 · 2013-03-06T12:30:17.743

4

Of course it is. You can configure a default compiler in configure.ac and if the user wants to use another compiler, he (or she) can pass it to the ./configure script.

You'll find more about it here: How to use autotools.

The part that might be interesting for you is at the middle of the page:

#if a compiler is not specified by the user use intel compilers
AC_PATH_PROG(CC_PATH, $CC, NO_PATH)
if test "$CC_PATH" = NO_PATH; then
 CC="icc"
fi

edited Mar 06 '13 at 12:30

answered Aug 14 '09 at 23:15

Can't you just do this as well: – freedrull Feb 24 '11 at 05:45
Under `autoconf` 2.69, what you suggested results in `The usual way to define 'CC' is to add 'AC_PROG_CC'` for me. – JDQ Jan 20 '21 at 08:36

score 2 · Answer 4 · answered Aug 15 '09 at 00:19

2

Usually you can just run

bash $ CC=icc ./configure

to use lcc, or any other compiler as the C compiler, provided the rest of the configure and build process doesn't use any gcc'ism.

answered Aug 15 '09 at 00:19

nos

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It is better to use: $ ./configure CC=icc. If you pass CC as an argument to configure then re-configuring with config-status will work. If you set CC in the environment, then it will not. – William Pursell Aug 15 '09 at 12:05

How do I get autotools to compile with the Intel compiler?

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