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| author | Chris Lattner <sabre@nondot.org> | 2010-08-03 22:53:22 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-08-03 22:53:22 +0000 |
| commit | 7cf8fc7a45373aab97ce58130087b8b5db064f54 (patch) | |
| tree | 55af786206ada3b6ac734d46604740472282629b /Makefile.config.in | |
| parent | 656f6800b2930ebbdc4c36746f47723174100acf (diff) | |
| download | external_llvm-7cf8fc7a45373aab97ce58130087b8b5db064f54.zip external_llvm-7cf8fc7a45373aab97ce58130087b8b5db064f54.tar.gz external_llvm-7cf8fc7a45373aab97ce58130087b8b5db064f54.tar.bz2 | |
Make the makefiles go much faster by using the realpath
builtin instead of shell. On my 8 core mac pro, this speeds
up a 'make -j8' null build of the lib directory from 1.11s to
0.77s wall time.
Patch by NAKAMURA Takumi!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110166 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'Makefile.config.in')
| -rw-r--r-- | Makefile.config.in | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/Makefile.config.in b/Makefile.config.in index 1d54b31..5ebd803 100644 --- a/Makefile.config.in +++ b/Makefile.config.in @@ -39,14 +39,18 @@ ifndef PROJECT_NAME PROJECT_NAME := $(LLVMPackageName) endif -PROJ_OBJ_DIR := $(shell $(PWD)) -PROJ_OBJ_ROOT := $(shell cd $(PROJ_OBJ_DIR)/$(LEVEL); $(PWD)) +# The macro below is expanded when 'realpath' is not built-in. +# Built-in 'realpath' is available on GNU Make 3.81. +realpath = $(shell cd $(1); $(PWD)) + +PROJ_OBJ_DIR := $(call realpath, .) +PROJ_OBJ_ROOT := $(call realpath, $(PROJ_OBJ_DIR)/$(LEVEL)) ifeq ($(PROJECT_NAME),llvm) -LLVM_SRC_ROOT := $(shell cd @abs_top_srcdir@; $(PWD)) -LLVM_OBJ_ROOT := $(shell cd @abs_top_builddir@; $(PWD)) -PROJ_SRC_ROOT := $(shell cd $(LLVM_SRC_ROOT); $(PWD)) -PROJ_SRC_DIR := $(shell cd $(LLVM_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR)); $(PWD)) +LLVM_SRC_ROOT := $(call realpath, @abs_top_srcdir@) +LLVM_OBJ_ROOT := $(call realpath, @abs_top_builddir@) +PROJ_SRC_ROOT := $(LLVM_SRC_ROOT) +PROJ_SRC_DIR := $(call realpath, $(LLVM_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR))) prefix := @prefix@ PROJ_prefix := $(prefix) PROJ_VERSION := $(LLVMVersion) @@ -66,7 +70,7 @@ endif ifndef LLVM_OBJ_ROOT $(error Projects must define LLVM_OBJ_ROOT) endif -PROJ_SRC_DIR := $(shell cd $(PROJ_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR)); $(PWD)) +PROJ_SRC_DIR := $(call realpath, $(PROJ_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR))) prefix := $(PROJ_INSTALL_ROOT) PROJ_prefix := $(prefix) ifndef PROJ_VERSION |