file(GET_RUNTIME_DEPENDENCIES): Implement command for FreeBSD

Closes: #25305

Help/command/file.rst

@@ -1487,7 +1487,13 @@ Handling Runtime Binaries
     for. This could be one of several values:
 
     * ``linux+elf``
+
+    * ``freebsd+elf``
+
+      .. versionadded:: 4.5
+
     * ``windows+pe``
+
     * ``macos+macho``
 
     If this variable is not specified, it is determined automatically by system
@@ -1502,7 +1508,7 @@ Handling Runtime Binaries
     ================================================= =============================================
        ``CMAKE_GET_RUNTIME_DEPENDENCIES_PLATFORM``       ``CMAKE_GET_RUNTIME_DEPENDENCIES_TOOL``
     ================================================= =============================================
-    ``linux+elf``                                     ``objdump``
+    ``linux+elf``, ``freebsd+elf``                    ``objdump``
     ``windows+pe``                                    ``objdump`` or ``dumpbin``
     ``macos+macho``                                   ``otool``
     ================================================= =============================================

Help/release/dev/freebsd-get-runtime-dependencies.rst

@@ -0,0 +1,5 @@
+freebsd-get-runtime-dependencies
+--------------------------------
+
+* The :command:`file(GET_RUNTIME_DEPENDENCIES)` command is now implemented
+  on FreeBSD.

Source/cmLDConfigLDConfigTool.cxx

@@ -36,9 +36,13 @@ bool cmLDConfigLDConfigTool::GetLDConfigPaths(std::vector<std::string>& paths)
   }
 
   cmList ldConfigCommand{ ldConfigPath };
+#ifdef __FreeBSD__
+  ldConfigCommand.emplace_back("-r"); // List directories
+#else
   ldConfigCommand.emplace_back("-v");
   ldConfigCommand.emplace_back("-N"); // Don't rebuild the cache.
   ldConfigCommand.emplace_back("-X"); // Don't update links.
+#endif
 
   cmUVProcessChainBuilder builder;
   builder.SetBuiltinStream(cmUVProcessChainBuilder::Stream_OUTPUT)
@@ -50,14 +54,35 @@ bool cmLDConfigLDConfigTool::GetLDConfigPaths(std::vector<std::string>& paths)
   }
 
   std::string line;
-  static cmsys::RegularExpression const regex("^([^\t:]*):");
   cmUVIStream output(process.OutputStream());
+#ifdef __FreeBSD__
+  // FreeBSD ldconfig output:
+  // /var/run/ld-elf.so.hints:
+  //    search directories: /lib:/usr/lib:...
+  // Extract everything after "search directories: " and split by ':'
+  static cmsys::RegularExpression regex("search directories: (.*)$");
+  while (std::getline(output, line)) {
+    cmsys::RegularExpressionMatch match;
+    if (!regex.find(line.c_str(), match))
+      continue;
+    auto allPaths = std::stringstream(match.match(1));
+    std::string path;
+    while (std::getline(allPaths, path, ':'))
+      if (!path.empty())
+        paths.push_back(path);
+  }
+#else
+  // Linux ldconfig output:
+  // /lib64: (from <builtin>:0)
+  // Extract the "/lib64" part
+  static cmsys::RegularExpression const regex("^([^\t:]*):");
   while (std::getline(output, line)) {
     cmsys::RegularExpressionMatch match;
     if (regex.find(line.c_str(), match)) {
       paths.push_back(match.match(1));
     }
   }
+#endif
 
   if (!process.Wait()) {
     this->Archive->SetError("Failed to wait on ldconfig process");

Source/cmRuntimeDependencyArchive.cxx

@@ -153,9 +153,11 @@ bool cmRuntimeDependencyArchive::Prepare()
       platform = "macos+macho";
     } else if (systemName == "Linux") {
       platform = "linux+elf";
+    } else if (systemName == "FreeBSD") {
+      platform = "freebsd+elf";
     }
   }
-  if (platform == "linux+elf") {
+  if (platform == "linux+elf" || platform == "freebsd+elf") {
     this->Linker = cm::make_unique<cmBinUtilsLinuxELFLinker>(this);
   } else if (platform == "windows+pe") {
     this->Linker = cm::make_unique<cmBinUtilsWindowsPELinker>(this);
@@ -403,7 +405,11 @@ cmRuntimeDependencyArchive::GetRPaths() const
 bool cmRuntimeDependencyArchive::PlatformSupportsRuntimeDependencies(
   std::string const& platform)
 {
-  static std::set<std::string> const supportedPlatforms = { "Windows", "Linux",
-                                                            "Darwin" };
+  static std::set<std::string> const supportedPlatforms = {
+    "Windows",
+    "Linux",
+    "Darwin",
+    "FreeBSD",
+  };
   return supportedPlatforms.count(platform);
 }

Tests/RunCMake/file-GET_RUNTIME_DEPENDENCIES/RunCMakeTest.cmake

@@ -60,7 +60,7 @@ elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
   run_cmake(project)
   run_cmake(badargs1)
   run_cmake(badargs2)
-elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux")
+elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux" OR CMAKE_HOST_SYSTEM_NAME STREQUAL "FreeBSD")
   if(DEFINED ENV{LDFLAGS})
     # Some setups prebake disable-new-dtags into LDFLAGS
     string(REPLACE "-Wl,--disable-new-dtags" "" new_ldflags "$ENV{LDFLAGS}")

Tests/RunCMake/file-GET_RUNTIME_DEPENDENCIES/file-filter-all-check.cmake

@@ -1,4 +1,4 @@
-if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux")
+if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux" OR CMAKE_HOST_SYSTEM_NAME STREQUAL "FreeBSD")
   set(_check
     [[[^;]*/Tests/RunCMake/file-GET_RUNTIME_DEPENDENCIES/file-filter-build/root-all/bin/\.\./lib/libdep1\.so]]
     [[[^;]*/Tests/RunCMake/file-GET_RUNTIME_DEPENDENCIES/file-filter-build/root-all/bin/\.\./lib/libdep2\.so]]

Tests/RunCMake/file-GET_RUNTIME_DEPENDENCIES/file-filter.cmake

@@ -40,7 +40,7 @@ ${call_list}
 add_executable(exe "${CMAKE_BINARY_DIR}/main.c")
 target_link_libraries(exe PRIVATE ${dep_list})
 
-if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+if(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
   set_property(TARGET exe PROPERTY INSTALL_RPATH "\${ORIGIN}/../lib")
 elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
   set_property(TARGET exe PROPERTY INSTALL_RPATH "@loader_path/../lib")