[poppler] [patch] fix qt3 detection bug

[Jan Engelhardt]

Testing for x86_64 goes horribly wrong on other 64-bit CPUs,
and it is not even the right thing to do, since _directories_
need not have _anything_ to do with _architectures_.
Please, just don't do such junk.

Patch tested on sparcv9.
---
 m4/qt.m4 |   90 +++++++--------------------------------------------------------
 1 file changed, 10 insertions(+), 80 deletions(-)

Index: poppler-0.12.0/m4/qt.m4
===================================================================
--- poppler-0.12.0.orig/m4/qt.m4
+++ poppler-0.12.0/m4/qt.m4
@@ -6,92 +6,22 @@
 # --------------------------------------------------------------
 AC_DEFUN([POPPLER_FIND_QT],
 [
-dnl Search paths for Qt 
-if test "$build_cpu" != "x86_64" ; then
-    qt_incdirs="$QTINC /usr/local/qt/include /usr/include/qt /usr/include /usr/X11R6/include/X11/qt /usr/X11R6/include/qt /usr/lib/qt3/include /usr/lib/qt/include /usr/share/qt3/include"
-    qt_libdirs="$QTLIB /usr/local/qt/lib /usr/lib/qt /usr/lib /usr/X11R6/lib/X11/qt /usr/X11R6/lib/qt /usr/lib/qt3/lib /usr/lib/qt/lib /usr/share/qt3/lib"
-else
-    qt_incdirs="$QTINC /usr/local/qt/include /usr/include/qt /usr/include /usr/X11R6/include/X11/qt /usr/X11R6/include/qt /usr/lib64/qt3/include /usr/lib64/qt/include /usr/share/qt3/include /usr/lib/qt3/include /usr/lib/qt/include"
-    qt_libdirs="$QTLIB /usr/local/qt/lib64 /usr/lib64/qt /usr/lib64 /usr/X11R6/lib64/X11/qt /usr/X11R6/lib64/qt /usr/lib64/qt3/lib64 /usr/lib64/qt/lib64 /usr/share/qt3/lib64 /usr/local/qt/lib /usr/lib/qt /usr/lib /usr/X11R6/lib/X11/qt /usr/X11R6/lib/qt /usr/lib/qt3/lib /usr/lib/qt/lib /usr/share/qt3/lib"
+AC_MSG_CHECKING([for qt3 libraries])
+have_qt=yes
+$1[]_CXXFLAGS=$(pkg-config qt-mt --cflags)
+if test "$?" -ne 0; then
+	have_qt=no
 fi
-if test -n "$QTDIR" ; then
-    qt_incdirs="$QTDIR/include $qt_incdirs"
-    if test "$build_cpu" != "x86_64" ; then
-        qt_libdirs="$QTDIR/lib $qt_libdirs"
-    else
-        qt_libdirs="$QTDIR/lib64 $QTDIR/lib $qt_libdirs"
-    fi
-fi
-
-dnl What to test
-qt_test_include="qstyle.h"
-qt_test_la_library="libqt-mt.la"
-qt_test_library="libqt-mt.so"
-
-dnl Check for Qt headers
-AC_MSG_CHECKING([for Qt headers])
-qt_incdir="no"
-for it in $qt_incdirs ; do
-    if test -r "$it/$qt_test_include" ; then
-        qt_incdir="$it"
-        break
-    fi
-done
-AC_MSG_RESULT([$qt_incdir])
-
-dnl Check for Qt libraries
-AC_MSG_CHECKING([for Qt libraries])
-qt_libdir="no"
-for qt_check in $qt_libdirs ; do
-    if test -r "$qt_check/$qt_test_la_library" ; then
-        qt_libdir="$qt_check"
-        break
-    fi
-
-    if test -r "$qt_check/$qt_test_library" ; then
-        qt_libdir="$qt_check"
-        break
-    fi
-done
-AC_MSG_RESULT([$qt_libdir])
-
-if test "x$qt_libdir" != "xno" ; then
-    if test "x$qt_incdir" != "xno" ; then
-        have_qt=yes
-    fi
+$1[]_LIBS=$(pkg-config qt-mt --libs)
+if test "$?" -ne 0; then
+	have_qt=no
 fi
 
 if test "x$have_qt" = "xyes"; then
-    AC_LANG_PUSH([C++])
-    pthread_needed=no
-
-    save_LDFLAGS=$LDFLAGS
-    save_CXXFLAGS=$CXXFLAGS
-    save_LIBS=$LIBS
-    CXXFLAGS="$CXXFLAGS -I$qt_incdir"
-    LIBS="$LIBS $qt_libdir/$qt_test_library"
-    AC_MSG_CHECKING([if Qt needs -pthread])
-    AC_TRY_LINK([#include <qt.h>], [QString s;], [pthread_needed=no], [pthread_needed=yes])
-    if test "x$pthread_needed" = "xyes"; then
-        LDFLAGS="$LDFLAGS -pthread"
-        AC_TRY_LINK([#include <qt.h>], [QString s;], [pthread_needed=yes], [pthread_needed=no])
-    fi
-    AC_MSG_RESULT([$pthread_needed])
-    LDFLAGS=$save_LDFLAGS
-    CXXFLAGS=$save_CXXFLAGS
-    LIBS=$save_LIBS
-
-    AC_LANG_POP
-
-    qtpthread=''
-    if test "x$pthread_needed" = "xyes"; then
-        qtpthread="-pthread"
-    fi
-
-    $1[]_CXXFLAGS="-I$qt_incdir"
-    $1[]_LIBS="$qtpthread $qt_libdir/$qt_test_library"
+	AC_MSG_RESULT([yes])
     ifelse([$2], , :, [$2])
 else
+	AC_MSG_RESULT([no])
     ifelse([$3], , [AC_MSG_FAILURE(dnl
 [Qt development libraries not found])],
   	   [$3])