PATH_MAX and testhello.sh

[Ron McCall <ronald dot mccall at snet dot net>]

Hi,

While building crosstool-0.38 on Fedora Core 4 (i686)
for powerpc-7450, gcc-3.4.1 and glibc 2.3.3 (the
default for demo-ppc7450.sh), I ran into a minor
problem.  At the step where testhello.sh is run to
build hello.c, I got the following error:

/opt/crosstool/gcc-3.4.1-glibc-2.3.3/powerpc-7450-linux-gnu/bin/powerpc-7450-linux-gnu-gcc
-static hello.c -o powerpc-7450-linux-gnu-hello-static
hello.c: In function `main':
hello.c:4: error: `PATH_MAX' undeclared (first use in
this function)
hello.c:4: error: (Each undeclared identifier is
reported only once
hello.c:4: error: for each function it appears in.)

I did a quick search to find which header(s) defined
PATH_MAX and found two:
/opt/crosstool/gcc-3.4.1-glibc-2.3.3/powerpc-7450-linux-gnu/powerpc-7450-linux-gnu/sys-include/linux/limits.h
and:
/opt/crosstool/gcc-3.4.1-glibc-2.3.3/powerpc-7450-linux-gnu/powerpc-7450-linux-gnu/include/linux/limits.h

The limits.h that hello.c actually includes is (found
via gcc -E):
/opt/crosstool/gcc-3.4.1-glibc-2.3.3/powerpc-7450-linux-gnu/lib/gcc/powerpc-7450-linux-gnu/3.4.1/include/limits.h
which doesn't include any other header files.  But,
that header is needed to get the definition for
LONG_MIN.

Adding a third include to hello.c, for
<linux/limits.h>, fixes the problem.  

Ron McCall

------
Want more information?  See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/
Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com