adjust various data/library paths automatically if we are run from a build tree

src/Makefile.am

@@ -74,6 +74,7 @@ AM_CFLAGS = \
 	$(LIBSAMPLERATE_CFLAGS) \
 	$(LIBSNDFILE_CFLAGS) \
 	$(LIBSPEEX_CFLAGS) \
+	-DPA_BUILDDIR=\"$(abs_builddir)\" \
 	-DPA_DLSEARCHPATH=\"$(modlibexecdir)\" \
 	-DPA_DEFAULT_CONFIG_DIR=\"$(PA_DEFAULT_CONFIG_DIR)\" \
 	-DPA_BINARY=\"$(PA_BINARY)\" \

src/daemon/daemon-conf.c

@@ -133,9 +133,25 @@ static const pa_daemon_conf default_conf = {
 };
 
 pa_daemon_conf* pa_daemon_conf_new(void) {
-    pa_daemon_conf *c = pa_xnewdup(pa_daemon_conf, &default_conf, 1);
+    pa_daemon_conf *c;
 
+    c = pa_xnewdup(pa_daemon_conf, &default_conf, 1);
+
+#if defined(__linux__) && !defined(__OPTIMIZE__)
+
+    /* We abuse __OPTIMIZE__ as a check whether we are a debug build
+     * or not. If we are and are run from the build tree then we
+     * override the search path to point to our build tree */
+
+    if (pa_run_from_build_tree()) {
+        pa_log_notice("Detected that we are run from the build tree, fixing search path.");
+        c->dl_search_path = pa_xstrdup(PA_BUILDDIR "/.libs/");
+
+    } else
+
+#endif
         c->dl_search_path = pa_xstrdup(PA_DLSEARCHPATH);
+
     return c;
 }
 

src/daemon/main.c

@@ -774,6 +774,8 @@ int main(int argc, char *argv[]) {
     pa_log_info(_("Using state directory %s."), s);
     pa_xfree(s);
 
+    pa_log_info(_("Using modules directory %s."), conf->dl_search_path);
+
     pa_log_info(_("Running in system mode: %s"), pa_yes_no(pa_in_system_mode()));
 
     if (pa_in_system_mode())

src/modules/alsa/alsa-mixer.c

@@ -929,7 +929,7 @@ static int element_zero_volume(pa_alsa_element *e, snd_mixer_t *m) {
 
 int pa_alsa_path_select(pa_alsa_path *p, snd_mixer_t *m) {
     pa_alsa_element *e;
-    int r;
+    int r = 0;
 
     pa_assert(m);
     pa_assert(p);
@@ -1849,7 +1849,12 @@ pa_alsa_path* pa_alsa_path_new(const char *fname, pa_alsa_direction_t direction)
     items[1].data = &p->description;
     items[2].data = &p->name;
 
-    fn = pa_maybe_prefix_path(fname, PA_ALSA_PATHS_DIR);
+    fn = pa_maybe_prefix_path(fname,
+#if defined(__linux__) && !defined(__OPTIMIZE__)
+                              pa_run_from_build_tree() ? PA_BUILDDIR "/modules/alsa/mixer/paths/" :
+#endif
+                              PA_ALSA_PATHS_DIR);
+
     r = pa_config_parse(fn, NULL, items, p);
     pa_xfree(fn);
 
@@ -3110,7 +3115,12 @@ pa_alsa_profile_set* pa_alsa_profile_set_new(const char *fname, const pa_channel
     if (!fname)
         fname = "default.conf";
 
-    fn = pa_maybe_prefix_path(fname, PA_ALSA_PROFILE_SETS_DIR);
+    fn = pa_maybe_prefix_path(fname,
+#if defined(__linux__) && !defined(__OPTIMIZE__)
+                              pa_run_from_build_tree() ? PA_BUILDDIR "/modules/alsa/mixer/profile-sets/" :
+#endif
+                              PA_ALSA_PROFILE_SETS_DIR);
+
     r = pa_config_parse(fn, NULL, items, ps);
     pa_xfree(fn);
 

src/pulsecore/core-util.c

@@ -2862,3 +2862,22 @@ void pa_reset_personality(void) {
 #endif
 
 }
+
+#if defined(__linux__) && !defined(__OPTIMIZE__)
+
+pa_bool_t pa_run_from_build_tree(void) {
+    char *rp;
+    pa_bool_t b = FALSE;
+
+    /* We abuse __OPTIMIZE__ as a check whether we are a debug build
+     * or not. */
+
+    if ((rp = pa_readlink("/proc/self/exe"))) {
+        b = pa_startswith(rp, PA_BUILDDIR);
+        pa_xfree(rp);
+    }
+
+    return b;
+}
+
+#endif

src/pulsecore/core-util.h

@@ -243,4 +243,8 @@ size_t pa_pipe_buf(int fd);
 
 void pa_reset_personality(void);
 
+#if defined(__linux__) && !defined(__OPTIMIZE__)
+pa_bool_t pa_run_from_build_tree(void);
+#endif
+
 #endif