1. Reproduce steps
1) Manually modify gcc/Makefile.in to delay the
generation of config.h:
...
diff --git a/gcc/Makefile.in b/gcc/Makefile.in
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -1622,9 +1622,12 @@ tm.h: cs-tm.h ; @true
tm_p.h: cs-tm_p.h ; @true
cs-config.h: Makefile
+ @echo "start to generate config.h `date`"
+ sleep 10
TARGET_CPU_DEFAULT="" \
HEADERS="$(host_xm_include_list)" DEFINES="$(host_xm_defines)" \
$(SHELL) $(srcdir)/mkconfig.sh config.h
+ @echo "config.h generated `date`"
cs-bconfig.h: Makefile
TARGET_CPU_DEFAULT="" \
...
2) configure and compile gcc failure
2. Analysis
While parallel make, the '$(ALL_HOST_OBJS) : | $(generated_files)' rule
doesn't work for these missing objects. And there was potential compile
failure.
[GCC #61899]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61899
Signed-off-by: Hongxu Jia <hongxu....@windriver.com>
---
gcc/Makefile.in | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index a726109..e753ebd 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -1224,6 +1224,7 @@ OBJS = \
dwarf2out.o \
emit-rtl.o \
et-forest.o \
+ errors.o \
except.o \
explow.o \
expmed.o \
@@ -1233,6 +1234,9 @@ OBJS = \
fold-const.o \
function.o \
fwprop.o \
+ gcc-ar.o \
+ gcc-nm.o \
+ gcc-ranlib.o \
gcse.o \
ggc-common.o \
gimple.o \
--
1.8.1.2
