GCC 4.3.0 configure failure: libgcc

4 msg	Extracting all functions from C++ source code
2 msg	Force GCC to unroll a loop?
5 msg	Syslog fixes a bug?
2 msg	gcc 4.2.x large file support
2 msg	Windows DEP problem with nested functions
8 msg	Porting GCC to 8051 Microcontroller
2 msg	Cleanup for thread local storage?
3 msg	GCC 4.3.2 Install into Cygwin
4 msg	gcno file doesn't include uncalled member funct...

GCC 4.3.0 configure failure: libgcc
\ James Molloy (6 May 2008)
. \ Ralf Wildenhues (6 May 2008)
. . \ James Molloy (7 May 2008)

2 msg	lex/yacc
1 msg	Building trunk -- error msg instrucitons not qu...
2 msg	MIPS atomic builtins
3 msg	Enabling loop unrolling in small sections of code.
1 msg	#pragma warning
2 msg	Problems building gcc 4.3
8 msg	gcc 4.3.0 -- program search path issue
1 msg	Re: WELCOME to gcc
2 msg	Include paths for cpp/g++ (gcc 4.3.0)
2 msg	Linking a library and source file into another ...

Subject:	GCC 4.3.0 configure failure: libgcc
Group:	Gcc-help
From:	James Molloy
Date:	6 May 2008

Hi,

I'm attempting to build GCC 4.3.0 - and I thought I had succeeded until
I realised that the 'all-gcc' make target (now?) doesn't build libgcc.a.

So I'm now trying to make the 'all' target, and I'm getting a configure
error in the libgcc directory. An extract of the config.log follows:

configure:4082: g++ -c -g -O2 conftest.cc >&5
conftest.cc: In function 'int main()':
conftest.cc:13: error: 'exit' was not declared in this scope
configure:4088: $? = 1
configure: failed program was:
| /* confdefs.h. */
|
| #define PACKAGE_NAME ""
| #define PACKAGE_TARNAME ""
| #define PACKAGE_VERSION ""
| #define PACKAGE_STRING ""
| #define PACKAGE_BUGREPORT ""
| /* end confdefs.h. */
|
| int
| main ()
| {
| exit (42);
| ;
| return 0;
| }

As you can see, the test program autoconf is generating does not include
<cstdlib>, so g++ is perfectly correct in erroring.

I'm not certain how to fix this - is it just a case of hacking the
config.in file? I'd appreciate any help.

Compiling GCC 4.3.0 from source using G++ 4.1.2, autoconf 2.61, and
automake 1.10.

Thanks,

James