[Mingw-notify] [ mingw-Bugs-557700 ] -nostartfiles ignored if main() exists

[<no...@so...>]

Bugs item #557700, was opened at 2002-05-18 17:12
You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=102435&aid=557700&group_id=2435

Category: gcc
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: KJK::Hyperion (kjkhyperion)
Assigned to: Danny Smith (dannysmith)
Summary: -nostartfiles ignored if main() exists

Initial Comment:
The program, "testfork", is composed by two source files:
 - 
crthybrid.c, containing the EXE's (true) entry 
point:

NTSTATUS STDCALL _PdxLdrEntry(PPEB 
Peb);

_PdxLdrEntry() sets up the file descriptors table, 
environment and parameters (it's a test program for a POSIX-on-NT 
system), and calls:

exit(main(argc, argv, 0));

 - 
testfork.c, containing a standard C main() function:

int 
main(int argc, char ** argv)
{
 /* ... */
}

gcc -
I../../../include -nostdinc -fno-builtin -I./ -
I../../../../../include -pipe -march=i386 -c crthybrid.c -o 
crthybrid.o
gcc -I../../../include -nostdinc -fno-builtin -I./ -
I../../../../../include -pipe -march=i386 -c testfork.c -o 
testfork.o
gcc -nostartfiles -Wl,--subsystem,console \
        -Wl,--
entry,___PdxLdrEntry@4  \
  -o testfork.nostrip.exe \
   
crthybrid.o testfork.o ../../../../../dk/w32/lib/ntdll.a 
../../../../../dk/w32/lib/kernel32.a 
../../../lib/psxdll/psxdll.a
../../../../../tools/rdel 
temp.exp
nm --numeric-sort testfork.nostrip.exe > 
testfork.sym
../../../../../tools/rcopy 
testfork.nostrip.exe testfork.exe

If testfork.c contains a 
function named main, testfork.exe is 15.7 KB, and it imports 
MSVCRT!atexit. If the function is named, for example, mymain, 
testfork.exe is 7.44 KB, and imports only functions I actually use. 
If I use -nostdlib, that doesn't stop gcc from trying to slip in its 
static library, but the compilation fails:

gcc -
I../../../include -nostdinc -fno-builtin -I./ -
I../../../../../include -pipe -march=i386 -c crthybrid.c -o 
crthybrid.o
gcc -I../../../include -nostdinc -fno-builtin -I./ -
I../../../../../include -pipe -march=i386 -c testfork.c -o 
testfork.o
gcc -nostartfiles -nostdlib -Wl,--subsystem,console 
\
	-Wl,--entry,___PdxLdrEntry@4  \
  -o testfork.nostrip.exe \
   
crthybrid.o testfork.o ../../../../../dk/w32/lib/ntdll.a 
../../../../../dk/w32/lib/kernel32.a 
../../../lib/psxdll/psxdll.a 

testfork.o(.text+0x43):testfork.c: undefined reference to 
`__main'
make: *** [testfork.nostrip.exe] Error 1

----------------------------------------------------------------------

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