fix c_lib on Cygwin

[mwhansen]

Cygwin can't load shared libraries via symlinks. Therefore, we have to actually copy libcsage.so/csage.dll over to $SAGE_LOCAL/lib/. Note that currently the "install" target in SConstruct does nothing.

CC: @williamstein

Component: porting: Cygwin

Author: Mike Hansen

Reviewer: William Stein

Merged: sage-4.4.3.alpha0

Issue created by migration from https://trac.sagemath.org/ticket/8843

[williamstein]

comment:2

Unfortunately, after applying this, libcsage just doesn't build anymore.

[mwhansen]

Attachment: trac_8843-c_lib.patch.gz

[mwhansen]

Reviewer: William Stein

[mwhansen]

comment:3

I've posted a new patch which should work.

[williamstein]

comment:4

Doesn't work:

Installing c_lib
g++ -o libcsage.so -shared src/convert.os src/interrupt.os src/mpn_pylong.os src/mpz_pylong.os src/mpz_longlong.os src/stdsage.os src/gmp_globals.os src/ZZ_pylong.os src/ntl_wrap.os -L/mnt/usb1/scratch/wstein/build/release/4.4.3/sage-4.4.3.alpha0/local/lib -L/mnt/usb1/scratch/wstein/build/release/4.4.3/sage-4.4.3.alpha0/local/lib/python/config -lntl -lgmp -lpari -lpython2.6
/usr/bin/ld: /mnt/usb1/scratch/wstein/build/release/4.4.3/sage-4.4.3.alpha0/local/lib/libpython2.6.a(exceptions.o): relocation R_X86_64_32 against `_Py_NoneStruct' can not be used when making a shared object; recompile with -fPIC
/mnt/usb1/scratch/wstein/build/release/4.4.3/sage-4.4.3.alpha0/local/lib/libpython2.6.a: could not read symbols: Bad value
collect2: ld returned 1 exit status
scons: *** [libcsage.so] Error 1
ERROR: There was an error building c_lib.

However, Mike says there is a Python spkg that may fix this...

[williamstein]

Merged: 4.4.3.alpha0

[williamstein]

Changed reviewer from William Stein to wstein

[sagetrac-mvngu]

Changed merged from 4.4.3.alpha0 to sage-4.4.3.alpha0

[sagetrac-mvngu]

Changed reviewer from wstein to William Stein