TODO
author "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>
Fri Jan 27 13:31:16 2012 +0100 (2012-01-27)
changeset 2854 a70abdbfa342
parent 1731 648fcf1f4568
child 3306 80e46e644bc0
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>
yann@1335
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This is a somewhat ordered TODO list:
yann@1335
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antony@2564
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Recurring tasks:
yann@1335
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yann@1335
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- update versions for every tools...
yann@1335
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yann@1731
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- update and/or upgrade all samples
yann@1731
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yann@1335
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yann@1403
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Non-recurring tasks:
yann@1335
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yann@1731
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- update newlib (for enhanced bare metal)
yann@1731
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  - confirm existing implementation on targets other than AVR32
yann@1731
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  - try to make it generic, will help for uClibc++
yann@1512
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yann@1731
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- multilib
yann@1335
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yann@1731
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- Cygwin target (needs newlib)
yann@1731
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  - so we can build toolchains that generate code for Windows/Cygwin
yann@1731
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yann@1731
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- Cygwin host
yann@1731
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  - so we can build toolchains that run natively under Windows/Cygwin
yann@1731
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yann@1731
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- mingw32 target
yann@1731
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  - so we can build toolchains that generate code for Windows/Win32
yann@1731
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yann@1731
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- mingw32 host
yann@1731
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  - so we can build toolchains that run natively under Windows/Win32
yann@1731
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    (without requiring Cygwin)
yann@1335
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yann@1335
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- uClibc++
yann@1335
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  - see newlib, above
yann@1335
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yann@1731
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- uClinux
yann@1731
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  - check whether we can use newlib under uClinux (?)