steps.mk
author "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>
Fri Jan 27 13:31:16 2012 +0100 (2012-01-27)
changeset 2854 a70abdbfa342
parent 2278 e86826b8621a
child 2905 286b2937c101
child 2912 6467c949c91c
permissions -rw-r--r--
complibs/cloog: fix linking with libm

In Ubuntu 11.04 and 11.10, the default options for ld have changed.
--no-copy-dt-needed-entries and --as-needed are now enabled by default, which
causes errors like:

[EXTRA] Checking CLooG/ppl
[DEBUG] ==> Executing: 'make' '-j3' '-s' 'check'
[ALL ] Making check in .
[ALL ] config.status: creating include/cloog/cloog-config.h
[ALL ] config.status: include/cloog/cloog-config.h is unchanged
[ALL ] libtool: link: i686-build_pc-linux-gnu-gcc -Wall -fomit-frame-pointer
-pipe -o cloog cloog.o -L/<snip>/build/static/lib ./.libs/libcloog.a -lm
/<snip>/build/static/lib/libppl_c.a /<snip>/build/static/lib/libpwl.a
/<snip>/build/static/lib/libppl.a /<snip>/build/static/lib/libgmpxx.a
/<snip>/build/static/lib/libgmp.a -lstdc++
[ALL ] /usr/bin/ld: /<snip>/build/static/lib/libppl.a(MIP_Problem.o):
undefined reference to symbol 'sqrt@@GLIBC_2.0'
[ALL ] /usr/bin/ld: note: 'sqrt@@GLIBC_2.0' is defined in DSO
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/libm.so so try adding
it to the linker command line
[ALL ] /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/libm.so:
could not read symbols: Invalid operation
[ALL ] collect2: ld returned 1 exit status
[ERROR] make[2]: *** [cloog] Error 1
[ERROR] make[1]: *** [check-recursive] Error 1

See:
https://wiki.ubuntu.com/NattyNarwhal/ToolchainTransition

This patch fixes these errors by placing '-lm' at the right place on the command
line as libppl requires libm when linking cloog.

Signed-off-by: "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>
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# Makefile for each steps
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# Copyright 2006 Yann E. MORIN <yann.morin.1998@anciens.enib.fr>
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# ----------------------------------------------------------
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# This is the steps help entry
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help-build::
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	@echo  '  list-steps         - List all build steps'
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help-env::
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	@echo  '  STOP=step          - Stop the build just after this step (list with list-steps)'
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	@echo  '  RESTART=step       - Restart the build just before this step (list with list-steps)'
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# ----------------------------------------------------------
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# The steps list
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# Please keep the last line with a '\' and keep the following empy line:
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# it helps when diffing and merging.
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CT_STEPS := libc_check_config   \
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            gmp                 \
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            mpfr                \
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            ppl                 \
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            cloog               \
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            mpc                 \
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            libelf              \
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            binutils            \
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            elf2flt             \
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            sstrip              \
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            cc_core_pass_1      \
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            kernel_headers      \
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            libc_start_files    \
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            cc_core_pass_2      \
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            libc                \
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            cc                  \
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            libc_finish         \
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            libelf_target       \
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            binutils_target     \
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            debug               \
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            test_suite          \
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            finish              \
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# Make the list available to sub-processes (scripts/crosstool-NG.sh needs it)
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export CT_STEPS
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# Print the steps list
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PHONY += list-steps
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list-steps:
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	@echo  'Available build steps, in order:'
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	@for step in $(CT_STEPS); do    \
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	     echo "  - $${step}";       \
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	 done
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	@echo  'Use "<step>" as action to execute only that step.'
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	@echo  'Use "+<step>" as action to execute up to that step.'
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	@echo  'Use "<step>+" as action to execute from that step onward.'
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# ----------------------------------------------------------
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# This part deals with executing steps
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$(CT_STEPS):
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	$(SILENT)$(MAKE) -rf $(CT_NG) V=$(V) RESTART=$@ STOP=$@ build
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$(patsubst %,+%,$(CT_STEPS)):
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	$(SILENT)$(MAKE) -rf $(CT_NG) V=$(V) STOP=$(patsubst +%,%,$@) build
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$(patsubst %,%+,$(CT_STEPS)):
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	$(SILENT)$(MAKE) -rf $(CT_NG) V=$(V) RESTART=$(patsubst %+,%,$@) build