Package: gcc-4.4 Version: 4.4.4-7 Severity: normal Tags: upstream *** Please type your report below this line *** If gcc is invoked with "-MD", and a preprocessor error occurs, an empty dependency file is left. This leads to a problem in the following scenario: - program is compiled OK - a change in an included header causes a preprocessor error - next compilation fails (correctly), but leaves empty .d file - header is fixed - next compilation does nothing, because object/binary is still newer than C file, and because of the empty .d file, the dependency on the (newer) header is lost The attached file demonstrates this scenario (just "make" to run all steps, requires GNU make). A work-around (commented out in the example) is to remove the gcc output file (normally the object file, in the simplified example the binary) before calling gcc. But I think gcc should remove the .d file itself if it can't complete it due to an error. -- System Information: Debian Release: squeeze/sid APT prefers testing APT policy: (500, 'testing') Architecture: i386 (i686) Kernel: Linux 2.6.34 (SMP w/1 CPU core) Locale: LANG=de_DE, LC_CTYPE=de_DE (charmap=ISO-8859-1) Shell: /bin/sh linked to /bin/dash Versions of packages gcc-4.4 depends on: ii binutils 2.20.1-12 The GNU assembler, linker and bina ii cpp-4.4 4.4.4-7 The GNU C preprocessor ii gcc-4.4-base 4.4.4-7 The GNU Compiler Collection (base ii libc6 2.11.2-2 Embedded GNU C Library: Shared lib ii libgcc1 1:4.4.4-7 GCC support library ii libgomp1 4.4.4-7 GCC OpenMP (GOMP) support library Versions of packages gcc-4.4 recommends: ii libc6-dev 2.11.2-2 Embedded GNU C Library: Developmen Versions of packages gcc-4.4 suggests: ii gcc-4.4-doc 4.4.4.nf1-1 documentation for the GNU compiler pn gcc-4.4-locales <none> (no description available) ii gcc-4.4-multilib 4.4.4-7 The GNU C compiler (multilib files pn libcloog-ppl0 <none> (no description available) pn libgcc1-dbg <none> (no description available) pn libgomp1-dbg <none> (no description available) pn libmudflap0-4.4-dev <none> (no description available) pn libmudflap0-dbg <none> (no description available) pn libppl-c2 <none> (no description available) pn libppl7 <none> (no description available) -- no debconf information
Attachment:
Makefile
Description: Binary data
#include <stdio.h>
#include "foo.h"
int main ()
{
puts (S);
return 0;
}