Hi All,
I'm trying to get a value provided on the ./configure invocation
through to C code so it can be used. I'm trying to do this with
AC_DEFINE but maybe this is a job for something else.
Perhaps this is easiest to understand with some code so here's a dummy
example
== configure.ac ==
AC_PREREQ([2.69])
AC_INIT([test], [0.1], [])
AM_INIT_AU
TOMAKE([foreign])
AC_CONFIG_SRCDIR([test.c])
AC_CONFIG_HEADERS([config.h]
)
AC_PROG_CC
AC_CONFIG_FILES([Makefile])
AC_ARG_ENABLE([entity],
[AS_HELP_STRING([--enable-entity],
[Set entity @<:@default=World@:>@])],
[],
[enable_enity=World])
AC_DEFINE([ENTITY],[${enable_entity}],[Entity])
AC_OUTPUT
== Makefile.am ==
AM_CPPFLAGS = -include config.h
bin_PROGRAMS = test
== test.c ==
#include <stdio.h>
int main(int argc, char *argv[])
{
printf("Hello %s!\n", ENTITY);
return 0;
}
I'd like to be able to run
$ ./configure --enable-entity=Universe
$ make && ./test
And get
Hello Universe!
But the value isn't making it through to the code. Instead I get a
compile error
In file included from <command-line>:0:0:
test.c: In function ‘main’:
./config.h:5:16: error: ‘$’ undeclared (first use in this function)
#define ENTITY ${enable_entity}
Which is a bit too literal. I suspect I'm missing something (like
AC_SUBST). But I can't for all the searching figure out how to get a
value from the ./configure invocation through to the end program.
Any help would be greatly appreciated.
Thanks,
Chris
_______________________________________________
Autoconf mailing list
Autoconf@gnu.org
https://lists.gnu.org/mailman/listinfo/autoconf
