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| author | Len Brown <len.brown@intel.com> | 2004-11-08 14:04:39 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2004-11-08 14:04:39 -0500 |
| commit | 07978ba9386dd6cf9b7a4149b621f6202bb186aa (patch) | |
| tree | aad986fb7ac396524166c8c692402b6c82666c68 /Documentation | |
| parent | dad99cb437e463e628e406c7c1cf2d90661abe77 (diff) | |
| parent | 34fe9c27f1cf97ed05df24d7000ea2f9590b6639 (diff) | |
| download | history-07978ba9386dd6cf9b7a4149b621f6202bb186aa.tar.gz | |
Merge intel.com:/home/lenb/bk/26-latest-ref
into intel.com:/home/lenb/src/26-latest-dev
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kbuild/makefiles.txt | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index c565581d296767..2616a58a5a4b82 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -6,7 +6,7 @@ This document describes the Linux kernel Makefiles. === 1 Overview === 2 Who does what - === 3 The kbuild Makefiles + === 3 The kbuild files --- 3.1 Goal definitions --- 3.2 Built-in object goals - obj-y --- 3.3 Loadable module goals - obj-m @@ -101,11 +101,14 @@ These people need to know about all aspects of the kernel Makefiles. This document is aimed towards normal developers and arch developers. -=== 3 The kbuild Makefiles +=== 3 The kbuild files Most Makefiles within the kernel are kbuild Makefiles that use the kbuild infrastructure. This chapter introduce the syntax used in the kbuild makefiles. +The preferred name for the kbuild files is 'Kbuild' but 'Makefile' will +continue to be supported. All new developmen is expected to use the +Kbuild filename. Section 3.1 "Goal definitions" is a quick intro, further chapters provide more details, with real examples. @@ -707,15 +710,17 @@ When kbuild executes the following steps are followed (roughly): probe supported options: #arch/i386/Makefile - check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc \ - /dev/null\ > /dev/null 2>&1; then echo "$(1)"; \ - else echo "$(2)"; fi) - cflags-$(CONFIG_MCYRIXIII) += $(call check_gcc,\ - -march=c3,-march=i486) - CFLAGS += $(cflags-y) + ... + cflags-$(CONFIG_MPENTIUMII) += $(call cc-option,\ + -march=pentium2,-march=i686) + ... + # Disable unit-at-a-time mode ... + CFLAGS += $(call cc-option,-fno-unit-at-a-time) + ... + - The above examples both utilise the trick that a config option expands + The first examples utilises the trick that a config option expands to 'y' when selected. CFLAGS_KERNEL $(CC) options specific for built-in |