Provide cmake test if alignment requirement is strict

[openssl-gost/engine.git] / CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1d4d65b86de17edf15ba656cb0b8dab578af5487..0c8cb2c6e93d553d57a9805c99a3054b761d5adb 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ include(CheckCSourceRuns)
 
 enable_testing()
 
-find_package(OpenSSL 3.0 REQUIRED)
+find_package(OpenSSL 1.1.1 REQUIRED)
 include_directories(${OPENSSL_INCLUDE_DIR})
 
 if (CMAKE_C_COMPILER_ID MATCHES "Clang")
@@ -66,6 +66,18 @@ if (ADDCARRY_U64)
   add_definitions(-DHAVE_ADDCARRY_U64)
 endif()
 
+check_c_source_runs("
+  int main(void) {
+    char buf[16] = { 0, 1, 2 };
+    int *p = buf + 1;
+    int *q = buf + 2;
+    return (*p == *q);
+  }
+  " RELAXED_ALIGNMENT)
+if (NOT RELAXED_ALIGNMENT)
+  add_definitions(-DSTRICT_ALIGNMENT)
+endif()
+
 set(BIN_DIRECTORY bin)
 
 # Same soversion as OpenSSL