package/ola: fix autoreconf issue for host-ola

From 991eef9f84a5ef58eaab8ea0a85f3b4bce7b00a3 Mon Sep 17 00:00:00 2001

From: Romain Naour <romain.naour@openwide.fr>

Date: Sat, 2 May 2015 01:50:14 +0200

Subject: [PATCH] autotools: don't overwrite CC and CXX with ACX_PTHREAD

 success

If ACX_PTHREAD sucess, CC and CXX value are overwriten respectively

to PTHREAD_CC and PTHREAD_CXX. But ACX_PTHREAD has been hacked to

set PTHREAD_CXX variable for the C++ compiler and configure.ac has

been modified accordingly.

If ax_pthread.m4 wich provide standard AX_PTHREAD macro (and it's

alias ACX_PTHREAD and AX_PTHREAD), is installed on the system by

autoconf-archive package, then ax_pthread.m4 is used during

autoreconf instread of acx_pthread.m4 bundled with ola.

AX_PTHREAD macro from ax_pthread.m4 check only the thread support

with the C compiler. As a result, the C++ compiler variable

PTHREAD_CXX is not initialized, so CXX become empy and the build

fail during resolv.h check.

configure:19945: checking for 2-arg pthread_setname_np

configure:19965:  -o conftest -O2 [snip -I and -L] conftest.cpp  -ldl  >&5

./configure: line 2037: -o: command not found

In the Buildroot use case, it's safe to remove CC and CXX overwrite

since only gcc/g++ compiler are used.

Signed-off-by: Romain Naour <romain.naour@openwide.fr>

---

 configure.ac | 4 +---

 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac

index b1946b6..ef85af5 100644

--- a/configure.ac

+++ b/configure.ac

@@ -303,9 +303,7 @@ AM_CONDITIONAL([HAVE_NCURSES], [test "x$have_ncurses" = xyes])

 ACX_PTHREAD([

              LIBS="$PTHREAD_LIBS $LIBS"

              CFLAGS="$CFLAGS $PTHREAD_CFLAGS"

-             CXXFLAGS="$CXXFLAGS $PTHREAD_CXXFLAGS"

-             CC="$PTHREAD_CC"

-             CXX="$PTHREAD_CXX"],

+             CXXFLAGS="$CXXFLAGS $PTHREAD_CXXFLAGS"],

             [AC_MSG_ERROR([Missing pthread, please install it])])

 # pthread_setname_np can take either 1 or 2 arguments.

-- 

1.9.3