Solaris 2.5.1, gcc version 2.96 20000803; -lthread now required to link

[Jim McKelvey <mckelvey at bean dot jpl dot nasa dot gov>]

-lpthread now required for linking non-thread code:

mushroom...PM>g++ -g   -fsquangle -Wold-style-cast -ansi -pedantic-errors 
-fno-common -fstrict-aliasing -Wall -W -Wsign-promo -Wpointer-arith -Wcast-qual 
-Wconversion -Wmissing-prototypes -Wwrite-strings -Winline -Woverloaded-virtual 
-fimplicit-templates  -L. -v -o compare compare.cc
Reading specs from 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/specs
gcc version 2.96 20000803 (experimental)
 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/cpp0 -lang-c++ -D__GNUG__=2 -trigraphs -$ -D__STRICT_ANSI__ -v 
-D__GNUC__=2 -D__GNUC_MINOR__=96 -D__GNUC_PATCHLEVEL__=0 -D__sparc__ -D__sun__ 
-D__unix__ -D__svr4__ -D__SVR4 -D__sparc -D__sun -D__unix -Asystem(unix)  
-Asystem(svr4) -g -Wold-style-cast -Wall -W -Wsign-promo -Wpointer-arith  
-Wcast-qual -Wconversion -Wmissing-prototypes -Wwrite-strings -Winline 
-Woverloaded-virtual -pedantic-errors -D__GCC_NEW_VARARGS__ -Acpu(sparc)  
-Amachine(sparc) compare.cc /var/tmp/ccikvBpc.ii
GNU CPP version 2.96 20000803 (experimental) (cpplib)
 (sparc)
#include "..." search starts here:
#include <...> search starts here:
 /afs/jpl.nasa.gov/home/m/mckelvey/public/Software/include/g++-3
 /usr/local/include
 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/include
 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/sparc-sun-solaris2.5.1/include
 /usr/include
End of search list.
 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/cc1plus /var/tmp/ccikvBpc.ii -quiet -dumpbase compare.cc -ansi -g 
-Wold-style-cast -Wall -W -Wsign-promo -Wpointer-arith -Wcast-qual -Wconversion 
-Wmissing-prototypes -Wwrite-strings -Winline -Woverloaded-virtual 
-pedantic-errors -ansi -version -fsquangle -fno-common -fstrict-aliasing  
-fimplicit-templates -o /var/tmp/ccNoeFIe.s
GNU C++ version 2.96 20000803 (experimental) (sparc-sun-solaris2.5.1) compiled 
by GNU C version 2.96 20000803 (experimental).
 /usr/ccs/bin/as -V -Qy -s -o /var/tmp/ccewZxrd.o /var/tmp/ccNoeFIe.s
/usr/ccs/bin/as: WorkShop Compilers 4.2 dev 13 May 1996
 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/collect2 -V -Y P,/usr/ccs/lib:/usr/lib -Qy -o compare 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/crt1.o 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/crti.o /usr/ccs/lib/values-Xc.o 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/crtbegin.o -L. 
-L/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solari
s2.5.1/2.96 -L/usr/ccs/bin -L/usr/ccs/lib 
-L/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solari
s2.5.1/2.96/../../.. /var/tmp/ccewZxrd.o -lstdc++ -lm -lgcc -lc -lgcc 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/crtend.o 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/crtn.o
ld: Software Generation Utilities - Solaris/ELF (3.0)
Undefined                       first referenced
 symbol                             in file
pthread_getspecific                 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/libgcc.a(_eh.o)
pthread_once                        
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/libgcc.a(_eh.o)
pthread_key_create                  
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/libgcc.a(_eh.o)
pthread_setspecific                 
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/libgcc.a(_eh.o)
pthread_create                      
/afs/jpl.nasa.gov/home/m/mckelvey/public/Software/lib/gcc-lib/sparc-sun-solaris2
.5.1/2.96/libgcc.a(_eh.o)
ld: fatal: Symbol referencing errors. No output written to compare
collect2: ld returned 1 exit status
mushroom...PM>