libcamera: utils: Move libcamera build path lookup to utils

The IPA proxy manager will need to find the libcamera build path exactly
the same way as the IPA module mnager. Move the isLibcameraInstalled()
and libcameraPath() functions to utils to make them reusable.

Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 2 insertions, 34 deletions

diff --git a/src/libcamera/ipa_manager.cpp b/src/libcamera/ipa_manager.cpp
index 238433dc..0bd280c2 100644
--- a/src/libcamera/ipa_manager.cpp
+++ b/src/libcamera/ipa_manager.cpp
@@ -9,9 +9,6 @@
 
 #include <algorithm>
 #include <dirent.h>
-#include <dlfcn.h>
-#include <elf.h>
-#include <link.h>
 #include <string.h>
 #include <sys/types.h>
 
@@ -27,35 +24,6 @@
  * \brief Image Processing Algorithm module manager
  */
 
-static bool isLibcameraInstalled()
-{
-	/* musl doesn't declare _DYNAMIC in link.h, declare it manually. */
-	extern ElfW(Dyn) _DYNAMIC[];
-
-	/*
-	 * DT_RUNPATH (DT_RPATH when the linker uses old dtags) is removed on
-	 * install.
-	 */
-	for (const ElfW(Dyn) *dyn = _DYNAMIC; dyn->d_tag != DT_NULL; ++dyn) {
-		if (dyn->d_tag == DT_RUNPATH || dyn->d_tag == DT_RPATH)
-			return false;
-	}
-
-	return true;
-}
-
-static std::string libcameraPath()
-{
-	Dl_info info;
-
-	/* Look up our own symbol. */
-	int ret = dladdr(reinterpret_cast<void *>(libcameraPath), &info);
-	if (ret == 0)
-		return nullptr;
-
-	return info.dli_fname;
-}
-
 namespace libcamera {
 
 LOG_DEFINE_CATEGORY(IPAManager)
@@ -151,8 +119,8 @@ IPAManager::IPAManager()
 	 * path for the IPA from that point. We need to recurse one level of
 	 * sub-directories to match the build tree.
 	 */
-	if (!isLibcameraInstalled()) {
-		std::string ipaBuildPath = utils::dirname(libcameraPath()) + "/../ipa";
+	if (!utils::isLibcameraInstalled()) {
+		std::string ipaBuildPath = utils::dirname(utils::libcameraPath()) + "/../ipa";
 		constexpr int maxDepth = 1;
 
 		LOG(IPAManager, Info)