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steps.mk
author Bryan Hundven <bryanhundven@gmail.com>
Sun Jun 26 03:26:54 2011 -0700 (2011-06-26)
changeset 2515 364b06df9e3a
parent 2278 e86826b8621a
child 2905 286b2937c101
child 2912 6467c949c91c
permissions -rw-r--r--
glibc: Refactor startfiles/headers into do_libc_backend()

Refactor the contents of 'do_libc_start_files()' and 'do_libc()' into a
parameterized 'do_libc_backend()'. 'do_libc_start_files()' and 'do_libc()'
call 'do_libc_backend()' with either 'libc_mode=startfiles' or
'libc_mode=final' (respectively) so that the startfiles/headers and
the final libc builds are configured and built with the same options.

One example of where this is needed is when building a mips toolchain.
Previously, if you were building an n32 toolchain, you wouldn't have
noticed an issue, because if '-mabi' is not in CFLAGS, n32 is the
default:

http://sourceware.org/git/?p=glibc-ports.git;a=blob;f=sysdeps/mips/preconfigure;hb=HEAD

But when trying to build an o32 or n64 toolchain the build would
have failed. This is because (e)glibc expects "-mabi={o32,n32,n64}" to be
in CFLAGS, but was not previously provided in 'do_libc_start_files()'.
The build failure would happen in the shared-core gcc when it tries to
configure an n64 or o32 gcc with an n32 libc.

A simpler solution would have been to just add TARGET_CFLAGS to configure
in 'do_libc_start_files()', but this way makes configure and make
consistent for both steps.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com> 
     1 # Makefile for each steps

     2 # Copyright 2006 Yann E. MORIN <yann.morin.1998@anciens.enib.fr>

     3 

     4 # ----------------------------------------------------------

     5 # This is the steps help entry

     6 

     7 help-build::

     8 	@echo  '  list-steps         - List all build steps'

     9 

    10 help-env::

    11 	@echo  '  STOP=step          - Stop the build just after this step (list with list-steps)'

    12 	@echo  '  RESTART=step       - Restart the build just before this step (list with list-steps)'

    13 

    14 # ----------------------------------------------------------

    15 # The steps list

    16 

    17 # Please keep the last line with a '\' and keep the following empy line:

    18 # it helps when diffing and merging.

    19 CT_STEPS := libc_check_config   \

    20             gmp                 \

    21             mpfr                \

    22             ppl                 \

    23             cloog               \

    24             mpc                 \

    25             libelf              \

    26             binutils            \

    27             elf2flt             \

    28             sstrip              \

    29             cc_core_pass_1      \

    30             kernel_headers      \

    31             libc_start_files    \

    32             cc_core_pass_2      \

    33             libc                \

    34             cc                  \

    35             libc_finish         \

    36             libelf_target       \

    37             binutils_target     \

    38             debug               \

    39             test_suite          \

    40             finish              \

    41 

    42 # Make the list available to sub-processes (scripts/crosstool-NG.sh needs it)

    43 export CT_STEPS

    44 

    45 # Print the steps list

    46 PHONY += list-steps

    47 list-steps:

    48 	@echo  'Available build steps, in order:'

    49 	@for step in $(CT_STEPS); do    \

    50 	     echo "  - $${step}";       \

    51 	 done

    52 	@echo  'Use "<step>" as action to execute only that step.'

    53 	@echo  'Use "+<step>" as action to execute up to that step.'

    54 	@echo  'Use "<step>+" as action to execute from that step onward.'

    55 

    56 # ----------------------------------------------------------

    57 # This part deals with executing steps

    58 

    59 $(CT_STEPS):

    60 	$(SILENT)$(MAKE) -rf $(CT_NG) V=$(V) RESTART=$@ STOP=$@ build

    61 

    62 $(patsubst %,+%,$(CT_STEPS)):

    63 	$(SILENT)$(MAKE) -rf $(CT_NG) V=$(V) STOP=$(patsubst +%,%,$@) build

    64 

    65 $(patsubst %,%+,$(CT_STEPS)):

    66 	$(SILENT)$(MAKE) -rf $(CT_NG) V=$(V) RESTART=$(patsubst %+,%,$@) build
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