[PATCH] improve reproducibility build

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While running pulseaudio out of build dir (especially for cross
compiling), we should not expose pulseaudio build path[1], it is
helpful for reproducibility build[2].

As commit introduced [3cae4a0 doc: Add info about running pulseaudio
from the build dir], run pulseaudio from the build dir, __OPTIMIZE__
should be diabled, so add macro checking to drop PA_SRCDIR/PA_BUILDDIR
(in which contains build path) at precompilation.

[1] https://reproducible-builds.org/docs/build-path/
[2] https://reproducible-builds.org/

Signed-off-by: Hongxu Jia <hongxu.jia@xxxxxxxxxxxxx>
---
 src/daemon/daemon-conf.c      | 6 ++++--
 src/modules/alsa/alsa-mixer.c | 4 ++++
 src/pulsecore/core-util.c     | 4 +++-
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/daemon/daemon-conf.c b/src/daemon/daemon-conf.c
index f956a55..ba3ab6e 100644
--- a/src/daemon/daemon-conf.c
+++ b/src/daemon/daemon-conf.c
@@ -155,16 +155,18 @@ pa_daemon_conf *pa_daemon_conf_new(void) {
     c->dl_search_path = pa_sprintf_malloc("%s" PA_PATH_SEP "lib" PA_PATH_SEP "pulse-%d.%d" PA_PATH_SEP "modules",
                                           pa_win32_get_toplevel(NULL), PA_MAJOR, PA_MINOR);
 #else
+#if !defined(__OPTIMIZE__)
     if (pa_run_from_build_tree()) {
         pa_log_notice("Detected that we are run from the build tree, fixing search path.");
 #ifdef MESON_BUILD
         c->dl_search_path = pa_xstrdup(PA_BUILDDIR PA_PATH_SEP "src" PA_PATH_SEP "modules");
 #else
         c->dl_search_path = pa_xstrdup(PA_BUILDDIR);
-#endif
+#endif // Endof #ifdef MESON_BUILD
     } else
+#endif // Endof #if !defined(__OPTIMIZE__)
         c->dl_search_path = pa_xstrdup(PA_DLSEARCHPATH);
-#endif
+#endif // Endof #ifdef OS_IS_WIN32
 
     return c;
 }
diff --git a/src/modules/alsa/alsa-mixer.c b/src/modules/alsa/alsa-mixer.c
index 7d50fc7..e1f9361 100644
--- a/src/modules/alsa/alsa-mixer.c
+++ b/src/modules/alsa/alsa-mixer.c
@@ -2573,9 +2573,11 @@ static int path_verify(pa_alsa_path *p) {
 }
 
 static const char *get_default_paths_dir(void) {
+#if defined(__linux__) && !defined(__OPTIMIZE__)
     if (pa_run_from_build_tree())
         return PA_SRCDIR "/modules/alsa/mixer/paths/";
     else
+#endif
         return PA_ALSA_PATHS_DIR;
 }
 
@@ -4458,7 +4460,9 @@ pa_alsa_profile_set* pa_alsa_profile_set_new(const char *fname, const pa_channel
         fname = "default.conf";
 
     fn = pa_maybe_prefix_path(fname,
+#if defined(__linux__) && !defined(__OPTIMIZE__)
                               pa_run_from_build_tree() ? PA_SRCDIR "/modules/alsa/mixer/profile-sets/" :
+#endif
                               PA_ALSA_PROFILE_SETS_DIR);
 
     r = pa_config_parse(fn, NULL, items, NULL, false, ps);
diff --git a/src/pulsecore/core-util.c b/src/pulsecore/core-util.c
index 367e767..b7d352b 100644
--- a/src/pulsecore/core-util.c
+++ b/src/pulsecore/core-util.c
@@ -3269,15 +3269,17 @@ void pa_reset_personality(void) {
 }
 
 bool pa_run_from_build_tree(void) {
-    char *rp;
     static bool b = false;
 
+#if defined(__linux__) && !defined(__OPTIMIZE__)
+    char *rp;
     PA_ONCE_BEGIN {
         if ((rp = pa_readlink("/proc/self/exe"))) {
             b = pa_startswith(rp, PA_BUILDDIR);
             pa_xfree(rp);
         }
     } PA_ONCE_END;
+#endif
 
     return b;
 }
-- 
2.7.4

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