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* [devel] slatec, fortran libraries, weak symbols
@ 2004-11-26 21:26 Alexey Tourbin
  2004-11-26 21:30 ` Dmitry V. Levin
  2004-11-29  5:35 ` Constantin Mikhaylenko
  0 siblings, 2 replies; 8+ messages in thread
From: Alexey Tourbin @ 2004-11-26 21:26 UTC (permalink / raw)
  To: devel

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Здравствуйте.
Библиотека slatec собирается так:

for f in *.f; do g77 -c %optflags %optflags_shared "$f"; done
g77 -shared -o lib%name.so.%version -Wl,-soname=lib%name.so.%version *.o

echo 'main(){}' >ldtest.c
gcc ldtest.c lib%name.so.%version

В результате получается:

+ gcc ldtest.c libslatec.so.4.1
libslatec.so.4.1: undefined reference to `dgvec_'
libslatec.so.4.1: undefined reference to `uvec_'
libslatec.so.4.1: undefined reference to `uivp_'
libslatec.so.4.1: undefined reference to `duvec_'
libslatec.so.4.1: undefined reference to `duivp_'
libslatec.so.4.1: undefined reference to `gvec_'
libslatec.so.4.1: undefined reference to `dfmat_'
libslatec.so.4.1: undefined reference to `fmat_'
collect2: ld returned 1 exit status

При изучения исходников выяснилось следующее (цитирую из dbvsup.f):

C     The user must supply subroutines DFMAT, DGVEC, DUIVP and DUVEC,
C     when needed (they must be so named), to evaluate the derivatives
C     as follows
C
C        A. DFMAT must be supplied.

Т.е. функции, которые должны быть определены пользователем, на практике
оборачиваются undefined references в библиотеке.  Подозреваю, что эта
проблема может быть решена с помощью weak symbols.  Кто-нибудь знает,
как именно?

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^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2004-11-30 15:46 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-11-26 21:26 [devel] slatec, fortran libraries, weak symbols Alexey Tourbin
2004-11-26 21:30 ` Dmitry V. Levin
2004-11-29  5:35 ` Constantin Mikhaylenko
2004-11-29 11:04   ` [devel] " Alexey Tourbin
2004-11-29 11:25     ` Constantin Mikhaylenko
2004-11-29 12:51       ` Alexey Tourbin
2004-11-30 14:57           ` Alexey Tourbin
2004-11-30 15:46             ` Dmitry V. Levin

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