From: Mike Stepanek (mstepane) <mstepane@cisco.com>
Date: Wed, 30 Mar 2022 12:19:00 +0000 (+0000)
Subject: Pull request #3327: build: compile against libatomic if present
X-Git-Tag: 3.1.27.0~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4e14cb535221cab70c6656ef1c92a624921318b8;p=thirdparty%2Fsnort3.git

Pull request #3327: build: compile against libatomic if present

Merge in SNORT/snort3 from ~OSERHIIE/snort3:libatomic to master

Squashed commit of the following:

commit 720d367bae80b58612840d74a6af2d626ba1e4ad
Author: Oleksandr Serhiienko <oserhiie@cisco.com>
Date:   Mon Mar 28 21:19:14 2022 +0300

    build: compile against libatomic if present

    Thanks to W. Michael Petullo <mike@flyn.org>
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1e80b12de..c76152321 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -116,6 +116,14 @@ else ()
     DAQ Modules:    Dynamic")
 endif ()
 
+if (HAVE_ATOMIC)
+    message("\
+    libatomic:      User-specified")
+else ()
+    message("\
+    libatomic:      System-provided")
+endif ()
+
 if (HAVE_FLATBUFFERS)
     message("\
     Flatbuffers:    ON")
diff --git a/cmake/FindAtomic.cmake b/cmake/FindAtomic.cmake
new file mode 100644
index 000000000..f1c376f32
--- /dev/null
+++ b/cmake/FindAtomic.cmake
@@ -0,0 +1,11 @@
+find_library(ATOMIC_LIBRARIES NAMES atomic
+    HINTS ${ATOMIC_LIBRARIES_DIR_HINT})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Atomic DEFAULT_MSG ATOMIC_LIBRARIES)
+
+mark_as_advanced(ATOMIC_LIBRARIES)
+
+if (ATOMIC_LIBRARIES)
+    set(HAVE_ATOMIC "1")
+endif()
diff --git a/cmake/include_libraries.cmake b/cmake/include_libraries.cmake
index 6e3f6f33c..4f4edeafa 100644
--- a/cmake/include_libraries.cmake
+++ b/cmake/include_libraries.cmake
@@ -15,6 +15,7 @@ if (ENABLE_UNIT_TESTS)
 endif (ENABLE_UNIT_TESTS)
 
 # optional libraries
+find_package(Atomic QUIET)
 find_package(LibLZMA QUIET)
 find_package(Asciidoc QUIET)
 find_package(DBLATEX QUIET)
diff --git a/configure_cmake.sh b/configure_cmake.sh
index 8c2d2b147..6d901de1a 100755
--- a/configure_cmake.sh
+++ b/configure_cmake.sh
@@ -108,6 +108,8 @@ Optional Packages:
                             libhs include directory
     --with-hyperscan-libraries=DIR
                             libhs library directory
+    --with-atomic-libraries=DIR
+                            atomic library directory
     --with-flatbuffers-includes=DIR
                             flatbuffers include directory
     --with-flatbuffers-libraries=DIR
@@ -447,6 +449,9 @@ while [ $# -ne 0 ]; do
         --with-hyperscan-libraries=*)
             append_cache_entry HS_LIBRARIES_DIR PATH $optarg
             ;;
+        --with-atomic-libraries=*)
+            append_cache_entry ATOMIC_LIBRARIES_DIR_HINT PATH $optarg
+            ;;
         --with-flatbuffers-includes=*)
             append_cache_entry FLATBUFFERS_INCLUDE_DIR_HINT PATH $optarg
             ;;
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 756be1589..e737d536c 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -29,6 +29,10 @@ if ( ENABLE_STATIC_DAQ )
     LIST(APPEND EXTERNAL_LIBRARIES ${DAQ_STATIC_MODULE_LIBS})
 endif ()
 
+if ( HAVE_ATOMIC )
+    LIST(APPEND EXTERNAL_LIBRARIES ${ATOMIC_LIBRARIES})
+endif()
+
 if ( HAVE_FLATBUFFERS )
     LIST(APPEND EXTERNAL_LIBRARIES ${FLATBUFFERS_LIBRARIES})
 endif()