[GEDI] [PATCH 5/6] configure: Link test before auto-enabling the pulseaudio library

[Philippe Mathieu-Daudé]

Similarly to commit a73e82ef912, test the library links correctly
before considering it as usable.

This fixes using ./configure --static on Ubuntu 18.04:

  $ make subdir-aarch64-softmmu
  [...]
    LINK    aarch64-softmmu/qemu-system-aarch64
  /usr/bin/ld: cannot find -lpulse
  /usr/bin/ld: cannot find -lpulsecommon-11.1
  collect2: error: ld returned 1 exit status
  Makefile:204: recipe for target 'qemu-system-aarch64' failed
  make[1]: *** [qemu-system-aarch64] Error 1

  $ fgrep pulse config-host.mak
  PULSE_LIBS=-L/usr/lib/aarch64-linux-gnu/pulseaudio -lpulse -lpulsecommon-11.1

  $ lsb_release -cri
  Distributor ID: Ubuntu
  Release:        18.04
  Codename:       bionic

Signed-off-by: Philippe Mathieu-Daudé <philmd at redhat.com>
---
 configure | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/configure b/configure
index 4eed33e1b1..4d015496ae 100755
--- a/configure
+++ b/configure
@@ -3408,10 +3408,25 @@ for drv in $audio_drv_list; do
 
     pa | try-pa)
     if $pkg_config libpulse --exists; then
-        pulse_libs=$($pkg_config libpulse --libs)
-        audio_pt_int="yes"
-        if test "$drv" = "try-pa"; then
-            audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-pa/pa/')
+        pulse_cflags=$($pkg_config --cflags libpulse)
+        if test "$static" = "yes"; then
+            pulse_libs=$($pkg_config --libs --static libpulse)
+        else
+            pulse_libs=$($pkg_config --libs libpulse)
+        fi
+        # Packaging for the static libraries is not always correct.
+        # At least ubuntu 18.04 ships only shared libraries.
+        write_c_skeleton
+        if ! compile_prog "$pulse_cflags" "$pulse_libs" ; then
+            unset pulse_cflags pulse_libs
+            if test "$drv" = "try-pa"; then
+                audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-pa//')
+            fi
+        else
+            audio_pt_int="yes"
+            if test "$drv" = "try-pa"; then
+                audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-pa/pa/')
+            fi
         fi
     else
         if test "$drv" = "try-pa"; then
-- 
2.20.1