build: search unistd.h separately from sys/random.h for getentropy (#2104)

Signed-off-by: Martin Kröning <martin.kroening@eonerc.rwth-aachen.de>

diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index 3ef6535743301e983527cc823d0fdef05d954e99..98badd23713cebc271c1d69460899462190cd7e3 100644 (file)
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -100,8 +100,9 @@ if(${OQS_USE_OPENSSL})
     target_include_directories(common PRIVATE ${OPENSSL_INCLUDE_DIR})
     target_include_directories(internal PRIVATE ${OPENSSL_INCLUDE_DIR})
 else()
-    check_symbol_exists(getentropy "unistd.h;sys/random.h" CMAKE_HAVE_GETENTROPY)
-    if(${CMAKE_HAVE_GETENTROPY})
+    check_symbol_exists(getentropy "unistd.h" CMAKE_UNISTD_HAVE_GETENTROPY)
+    check_symbol_exists(getentropy "sys/random.h" CMAKE_SYS_RANDOM_HAVE_GETENTROPY)
+    if("${CMAKE_UNISTD_HAVE_GETENTROPY}" OR "${CMAKE_SYS_RANDOM_HAVE_GETENTROPY}")
         target_compile_definitions(common PRIVATE OQS_HAVE_GETENTROPY)
         target_compile_definitions(internal PRIVATE OQS_HAVE_GETENTROPY)
     endif()