[Bug testsuite/25741] New: Gcc testsuite isn't parallel build safe

["hjl at lucon dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Same filename is used in different tests. When "make -j4 check" was used, I got

FAIL: g++.dg/debug/trivial.C -gstabs+1 execution test
FAIL: gcc.dg/debug/trivial.c -gdwarf-2 execution test
FAIL: gcc.dg/debug/trivial.c -gdwarf-2 -O3 execution test
FAIL: g++.dg/debug/trivial.C -gstabs+1 -O3 execution test
FAIL: gcc.dg/debug/trivial.c -gdwarf-23 execution test
FAIL: g++.dg/debug/trivial.C -gstabs+ execution test
FAIL: gcc.dg/debug/trivial.c -gdwarf-23 -O3 execution test
FAIL: g++.dg/debug/trivial.C -gstabs+ -O2 execution test
FAIL: gcc.dg/debug/trivial.c -gstabs1 execution test
FAIL: gcc.dg/debug/trivial.c -gstabs1 -O (test for excess errors)
FAIL: g++.dg/debug/trivial.C -gstabs+ -O3 execution test
FAIL: gcc.dg/debug/trivial.c -gstabs1 -O3 execution test
FAIL: g++.dg/debug/trivial.C -gstabs+3 execution test
FAIL: gcc.dg/debug/trivial.c -gstabs -O execution test
FAIL: g++.dg/debug/trivial.C -gstabs+3 -O2 execution test
FAIL: gcc.dg/debug/trivial.c -gstabs -O3 execution test
FAIL: gcc.dg/debug/trivial.c -gstabs3 (test for excess errors)

Executing on host: /export/build/gnu/gcc-4.1/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-4.1/build-x86_64-linux/gcc/
/net/gnu-13/export/gnu/src/gcc-4.1/gcc/gcc/testsuite/gcc.dg/debug/trivial.c 
-gstabs1 -O  -fno-show-column  -lm   -o ./trivial.exe    (timeout = 300)
/usr/local/bin/ld: reopening ./trivial.exe: Text file busy^M
^M
/usr/local/bin/ld: final link failed: Text file busy^M
collect2: ld returned 1 exit status^M
compiler exited with status 1


-- 
           Summary: Gcc testsuite isn't parallel build safe
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl at lucon dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25741