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Be more aggressive about adding flags to thread compiles. The configure

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test only tests for building a binary, not building a shared library.

On Linux, you can build a binary with -pthread, but you can't build a
binary that uses a threaded shared library unless you also use -pthread
when building the binary, or adding -lpthread to the shared library
build.  This patch has the effect of doing the later by adding both
-pthread and -lpthread when building libpq.
This commit is contained in:
Bruce Momjian 2004-08-12 16:39:50 +00:00
parent 19f1370b1e
commit e48322a6d6
1 changed files with 14 additions and 9 deletions
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23
config/acx_pthread.m4
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@ -89,26 +89,29 @@ for flag in $acx_pthread_flags; do
-*)
AC_MSG_CHECKING([whether pthreads work with $flag])
PTHREAD_CFLAGS="$flag"
tryPTHREAD_CFLAGS="$flag"
;;
pthread-config)
# skip this if we already have flags defined, for PostgreSQL
if test x"$PTHREAD_CFLAGS" != x -o x"$PTHREAD_LIBS" != x; then continue; fi
AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)
if test x"$acx_pthread_config" = xno; then continue; fi
PTHREAD_CFLAGS="`pthread-config --cflags`"
PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
tryPTHREAD_CFLAGS="`pthread-config --cflags`"
tryPTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
fi
;;
*)
AC_MSG_CHECKING([for the pthreads library -l$flag])
PTHREAD_LIBS="-l$flag"
tryPTHREAD_LIBS="-l$flag"
;;
esac
save_LIBS="$LIBS"
save_CFLAGS="$CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
LIBS="$tryPTHREAD_LIBS $PTHREAD_LIBS $LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS $tryPTHREAD_CFLAGS"
# Check for various functions. We must include pthread.h,
# since some functions may be macros. (On the Sequent, we
@ -130,11 +133,13 @@ for flag in $acx_pthread_flags; do
AC_MSG_RESULT($acx_pthread_ok)
if test "x$acx_pthread_ok" = xyes; then
break;
# we continue with more flags because Linux needs -lpthread
# for libpq builds on PostgreSQL. The test above only
# tests for building binaries, not shared libraries.
PTHREAD_LIBS=" $tryPTHREAD_LIBS $PTHREAD_LIBS"
PTHREAD_CFLAGS="$PTHREAD_CFLAGS $tryPTHREAD_CFLAGS"
fi
PTHREAD_LIBS=""
PTHREAD_CFLAGS=""
done
fi