[ clisp-Bugs-1966375 ] tgamma from gnulib may be needed on solaris

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Bugs item #1966375, was opened at 2008-05-18 08:34
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Vladimir Volovich (vvv2)
Assigned to: Nobody/Anonymous (nobody)
Summary: tgamma from gnulib may be needed on solaris

Initial Comment:
some solaris versions (and other OSes), at least 8 and 9, do not contain the tgamma function:

http://www.gnu.org/software/gnulib/manual/gnulib.html#tgamma

so i'm getting an error like this when building clist 2.45 on solaris 8 using gcc 3.4.5:

gcc -g -O2 -W -Wswitch -Wcomment -Wpointer-arith -Wimplicit -Wreturn-type -Wmissing-declarations -Wno-sign-compare -O2 -fno-schedule-insns -fno-gcse -falign-functions=4 -DUNIX_BINARY_DISTRIB -DUNICODE -DDYNAMIC_FFI -DNO_READLINE -I. -x none modules.o regexi.o regex.o calls.o -lm -lnsl -lsocket gettext.o lisp.a -lintl -lncurses -ldl -lnsl -lsocket /opt/home/vvv/src/clisp/clisp-tools/lib/libavcall.a /opt/home/vvv/src/clisp/clisp-tools/lib/libcallback.a -L/opt/home/vvv/src/clisp/clisp-tools/lib -lsigsegv -lc -o lisp.run
Undefined                       first referenced
 symbol                             in file
tgamma                              calls.o
ld: fatal: Symbol referencing errors. No output written to lisp.run
collect2: ld returned 1 exit status
./clisp-link: failed in /opt/home/vvv/src/clisp/clisp-build/base

Please add tgamma (and a configure check) to your gllib.


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>Comment By: Vladimir Volovich (vvv2)
Date: 2008-05-18 09:08

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sorry, i should have said, clisp should either not use tgamma if it is not
available, or compute it (either based on lgamma as exp(lgamma(x)), or
using some other approach).


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Comment By: Vladimir Volovich (vvv2)
Date: 2008-05-18 08:42

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in fact, gnulib doesn't include tgamma.

But, on solaris, there is
double lgamma(double x);
which could/should be used instead of
double tgamma(double x);

(i.e. configure should check if tgamma is available, and if not, check if
lgamma is available, and #define tgamma lgamma in this case)

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