Compilation issue with --enable-thread-safety

Hello Frds,

I am getting following error while compiling Postgres7.4 or Postgres7.4.1 with option --enable-thread-safety

Details
/configure --prefix=/usr/local/pgsql74 --enable-thread-safety cc=/export/home/uxapps/workshop/SUNWspro/bin/cc CFLAGS='-mt' --without-readline

Platform Info:
uname -m = sun4u
uname -r = 5.8
uname -s = SunOS
uname -v = Generic_108528-09

I am using gmake
GNU Make version 3.78.1, by Richard Stallman and Roland McGrath.
Built for sparc-sun-solaris2.6

cc -Xa -G -h libecpg.so.4 execute.o typename.o descriptor.o data.o error.o prepa
re.o memory.o connect.o misc.o -L../../../../src/port -L../pgtypeslib -lpgtypes
-L../../../../src/interfaces/libpq -lpq -lm -pthread -R/usr/local/pgsql74/lib -o
libecpg.so.4.0
cc: Warning: multiple use of -h option, previous one discarded.
ld: fatal: recording name conflict: file `../../../../src/interfaces/libpq/libpq
so' and -h option provide identical dependency names: read
ld: fatal: File processing errors. No output written to libecpg.so.4.0
gmake[4]: *** [libecpg.so.4.0] Error 1
gmake[4]: Leaving directory `/home/rbhide/utilities/postgres-7.4/src/interfaces/
ecpg/ecpglib'
gmake[3]: *** [all] Error 2
gmake[3]: Leaving directory `/home/rbhide/utilities/postgres-7.4/src/interfaces/
ecpg'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/home/rbhide/utilities/postgres-7.4/src/interfaces'
gmake[1]: *** [all] Error 2
gmake[1]: Leaving directory `/home/rbhide/utilities/postgres-7.4/src'
gmake: *** [all] Error 2

If I remove --enable-thread-safety I am able to compile my code properly.

Is this a BUG or I am missing somethg.

Plz do comment.

Thanks,
Rajan Bhide