CFEngine 3.6 compilation fails on old oses due to the presence of fprintf as a macro

Compiling CFEngine on 32-bit RHEL 5 fails due to the following error:
<pre>
In file included from bootstrap.c:298:
bootstrap.inc:236:1: error: unterminated argument list invoking macro "fprintf"
bootstrap.c: In function 'WriteBuiltinFailsafePolicyToPath':
bootstrap.c:299: warning: statement with no effect
bootstrap.c:299: error: expected ';' before ')' token
bootstrap.c:299: error: expected statement before ')' token
</pre>

On old OSes, fprintf is a macro, not a real function, but the code looks like this (libpromises/bootstrap.c, line 296):
<pre>
fprintf(fout,
// The bootstrap.inc file is generated by "make bootstrap-inc"
#include "bootstrap.inc"
);
</pre>

The problem vanishes when I do this:
<pre>

// The bootstrap.inc file is generated by "make bootstrap-inc"
char * bootstrap_content =
#include "bootstrap.inc"
;

fprintf(fout, bootstrap_content);
</pre>