It is a strange patch because before this commit a gdb is working well
and after this commit there is exactly the same problem on Linux:
gdb refuses to know "main"
Author: grischka <grischka>
Date: Tue Feb 5 21:18:29 2013 +0100
tccelf: fix debug section relocation
With:
tcc -g hello.c
gdb a.out
b main
gdb refused to know "main" because of broken dwarf info.
in the same pass like
tcc -E one.c two.c three.c -o combined.i
This will allow to speed up a compilation process by using a commamd like
tcc -E *.c | tcc -o program.exe -xc -
It looks that multi-times initialization don't affect anything.
Only call to the free_defines(define_start) in tcc_preprocess()
is removed in assumption that free_defines(NULL) in
tcc_cleanup() will free all defines.
With this option on a defines are included into the output
(inside comments). This will allow to debug a problems like:
In file included from math.c:8:
In file included from /usr/include/math.h:43:
/usr/include/bits/nan.h:52: warning: NAN redefined
tcc -E -P
do not output a #line directive, a gcc compatible option
tcc -E -P1
don't follow a gcc preprocessor style and do output a standard
#line directive. In such case we don't lose a location info when
we going to compile a resulting file wtith a compiler not
understanding a gnu style line info.
A cpp from gcc do this.
A test case:
tcc -E tccasm.c -o tccasm.i
tcc -E tccasm.i -o tccasm.ii
After a patch the line numbers in tccasm.ii are the same
as in tccasm.i
Add a ".i" extension as alias for ".c"
GCC and file extensions:
.i C source code which should not be preprocessed.
Before a patch:
./tcc -E tccasm.c -o tccasm.i
./tcc -c tccasm.i -o tccasm.o
tccasm.i:1: error: unrecognized file type
seyko