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Document OBJCACHE and OBJCACHE_JOBS

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This commit is contained in:
Wilson Snyder 2009-12-13 11:46:29 -05:00
parent df69439b9c
commit 02c74b5bee
3 changed files with 22 additions and 10 deletions
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6
Makefile.in
View File

@ -145,11 +145,11 @@ DISTFILES := $(DISTFILES_INC)
VL_INST_MAN_FILES = verilator.1
ifeq ($(OBJCACHE_HOSTS),)
export OBJCACHE_JOBS :=
else
ifeq ($(OBJCACHE_JOBS),)
ifneq ($(OBJCACHE_HOSTS),)
export OBJCACHE_JOBS := -j $(shell objcache --jobs "$(OBJCACHE_HOSTS)")
endif
endif
default: all
all: all_nomsg msg_test

15
bin/verilator
View File

@ -1004,6 +1004,18 @@ After running Make, the C++ compiler should produce the following:
=over 4
=item OBJCACHE
Optionally specifies a caching or distribution program to place in front of
all runs of the C++ Compiler. For example, "objcache --read --write", or
"ccache". If using distcc, it would generally be run under either objcache
or ccache; see the documentation for those programs.
=item OBJCACHE_JOBS
Optionally lists Make flags that specifies parallel make jobs. For example
a 4 CPU system may use "-j 6" to request 6 parallel compiles when making.
=item SYSTEMC
Required for SystemC output mode. If set, specifies the directory
@ -2525,7 +2537,8 @@ to compile on parallel machines and avoid compilations altogether. See the
--output-split option, and the web for the ccache, distcc and icecream
packages, and the Make::Cache package available from
L<http://www.veripool.org/>. Make::Cache will skip GCC runs between
identical source builds, even across different users.
identical source builds, even across different users. You can use the
OBJCACHE environment variable to use these CC wrappers.
=item Why do so many files need to recompile when I add a signal?

11
src/Makefile.in
View File

@ -40,11 +40,10 @@ export OBJCACHE_HOSTS := $(shell rschedule --no-allow-reserved --similar hostnam
endif
endif
ifeq ($(OBJCACHE_HOSTS),)
export OBJCACHE :=
else
ifeq ($(OBJCACHE_JOBS),)
ifneq ($(OBJCACHE_HOSTS),)
export OBJCACHE_JOBS := -j $(shell objcache --jobs "$(OBJCACHE_HOSTS)")
export OBJCACHE := @objcache --read --write
endif
endif
UNDER_GIT = $(wildcard ../.git/logs/HEAD)
@ -65,13 +64,13 @@ ifeq ($(VERILATOR_NO_OPT_BUILD),1) # Faster laptop development... One build
@-cp -p $<.exe $@.exe
else
../verilator_bin: obj_opt prefiles
cd obj_opt && $(MAKE) TGT=../$@ -f ../Makefile_obj serial
cd obj_opt && $(MAKE) -j 1 TGT=../$@ -f ../Makefile_obj serial
cd obj_opt && $(MAKE) $(OBJCACHE_JOBS) TGT=../$@ -f ../Makefile_obj
endif
dbg: ../verilator_bin_dbg
../verilator_bin_dbg: obj_dbg prefiles
cd obj_dbg && $(MAKE) TGT=../$@ VL_DEBUG=1 -f ../Makefile_obj serial
cd obj_dbg && $(MAKE) -j 1 TGT=../$@ VL_DEBUG=1 -f ../Makefile_obj serial
cd obj_dbg && $(MAKE) $(OBJCACHE_JOBS) TGT=../$@ VL_DEBUG=1 -f ../Makefile_obj
prefiles::