Checked this with gcc-3.4.6 and gcc 4.1.2 on an ubuntu edgy box.
[EMAIL PROTECTED]:~/try/bug$ cat makefile
all:
gcc-3.4 -c main.c -o obj-c/main.o -MMD -MF obj-c/main.d
gcc-3.4 -E main.c -o obj-E/main.i -MMD -MF obj-E/main.d
diff obj-c/main.d obj-E/main.d
[EMAIL PROTECTED]:~/try/bug$ cat main.c
#include "aaa.h"
int main(void)
{
return AAA;
}
gcc-3.4 -c main.c -o obj-c/main.o -MMD -MF obj-c/main.d
gcc-3.4 -E main.c -o obj-E/main.i -MMD -MF obj-E/main.d
diff obj-c/main.d obj-E/main.d
1c1
< obj-c/main.o: main.c aaa.h
---
> main.o: main.c aaa.h
Contents of obj-c and obj-E are
[EMAIL PROTECTED]:~/try/bug$ ls obj-c/
main.d main.o
[EMAIL PROTECTED]:~/try/bug$ ls obj-E/
main.d main.i
A workaround that we can do is to use the -MT with the option at the moment.
--
Summary: behaviour with -MMD and -c / -E causes differring
behaviours.
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ramana dot radhakrishnan at codito dot com
GCC host triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30491
