From octave-maintainers-request at bevo dot che dot wisc dot edu Sat Feb 22 12:23:31 2003
Subject: Building 2.1.45 on cygwin
From: Andy Adler <adler at site dot uottawa dot ca>
To: octave-maintainers at bevo dot che dot wisc dot edu
Date: Sat, 22 Feb 2003 13:23:27 -0500 (EST)

Compiling 2.1.45 on cygwin gives the following error:

In libcruft, the following symbols are undefined

lapack/spotf2.o(.text+0x23b):spotf2.f: undefined reference to `_sgemv_'
lapack/spotf2.o(.text+0x275):spotf2.f: undefined reference to `_sscal_'
lapack/spotrf.o(.text+0x268):spotrf.f: undefined reference to `_ssyrk_'
lapack/spotrf.o(.text+0x34a):spotrf.f: undefined reference to `_sgemm_'
lapack/spotrf.o(.text+0x3e6):spotrf.f: undefined reference to `_strsm_'
collect2: ld returned 1 exit status
make[1]: *** [libcruft.dll] Error 1
make[1]: Leaving directory `/usr/src/octave-2.1.45/libcruft'
make: *** [libraries] Error 2

This can be fixed by stubbing them out.

$ cat foobar.c
int sgemv_(int foo) { return 1; }
int sscal_(int foo) { return 1; }
int ssyrk_(int foo) { return 1; }
int sgemm_(int foo) { return 1; }
int strsm_(int foo) { return 1; }
$ gcc -c foobar.c  -o foobar.o

And a slight modification to the makefile

$ diff -c Makefile Makefile.orig
*** Makefile    Sat Feb 22 12:09:16 2003
--- Makefile.orig       Sat Feb 22 12:08:54 2003
***************
*** 107,113 ****

  libcruft.$(SHLEXT): $(CRUFT_PICOBJ)
        rm -f $ at 
!       $(SH_LD) $(SH_LDFLAGS) $(SONAME_FLAGS) -o $ at  $^ $(LINK_DEPS) foobar.o

  $(CRUFT_OBJ):

--- 107,113 ----

  libcruft.$(SHLEXT): $(CRUFT_PICOBJ)
        rm -f $ at 
!       $(SH_LD) $(SH_LDFLAGS) $(SONAME_FLAGS) -o $ at  $^ $(LINK_DEPS)

  $(CRUFT_OBJ):


------------------------
These functions don't seem to be used anywhere else, so
this seems to work.
Is there a better way of handling this kind of situation?

Andy