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| author | Felix Fietkau <nbd@openwrt.org> | 2013-12-14 13:14:44 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2013-12-14 13:14:44 +0000 |
| commit | 5a6a47e43129716946df6309d3495f5205c7dd95 (patch) | |
| tree | 6c810c60272fa6eb783f96ca56ccfc93da180aba | |
| parent | 6cb542d6a4d7c3fb1120472be0320098742d2ae7 (diff) | |
| download | upstream-5a6a47e43129716946df6309d3495f5205c7dd95.tar.gz upstream-5a6a47e43129716946df6309d3495f5205c7dd95.tar.bz2 upstream-5a6a47e43129716946df6309d3495f5205c7dd95.zip | |
build: speed up kernel symbol export stripping
GNU grep has a high per-expression setup overhead when compiling regular
expressions. Use -F to force it to interpret the input as fixed strings,
which is much faster (fraction of a second instead of multiple minutes).
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 39049
| -rw-r--r-- | include/kernel-build.mk | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/kernel-build.mk b/include/kernel-build.mk index 27c7aee17a..d34365837d 100644 --- a/include/kernel-build.mk +++ b/include/kernel-build.mk @@ -76,9 +76,9 @@ define BuildKernel xargs $(TARGET_CROSS)nm | \ awk '$$$$1 == "U" { print $$$$2 } ' | \ sort -u > $(KERNEL_BUILD_DIR)/mod_symtab.txt - $(TARGET_CROSS)nm -n $(LINUX_DIR)/vmlinux.o | grep ' r __ksymtab' | sed -e 's,........ r __ksymtab_,,' > $(KERNEL_BUILD_DIR)/kernel_symtab.txt - grep -f $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_include.txt - grep -vf $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_exclude.txt + $(TARGET_CROSS)nm -n $(LINUX_DIR)/vmlinux.o | grep -F ' r __ksymtab' | sed -e 's,........ r __ksymtab_,,' > $(KERNEL_BUILD_DIR)/kernel_symtab.txt + grep -Ff $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_include.txt + grep -Fvf $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_exclude.txt ( \ echo '#define SYMTAB_KEEP \'; \ cat $(KERNEL_BUILD_DIR)/sym_include.txt | \ |