diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 4e8db8bf9..50f625053 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -25,7 +25,7 @@ IF (CMAKE_COMPILER_IS_GNUCC)
 ENDIF()
 IF (CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
 #    SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wconversion -Wno-sign-conversion")
-    SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wsign-compare -Wall -Werror -Wno-unknown-pragmas -Wstrict-prototypes -Wpointer-arith -Wno-char-subscripts -Wno-long-long")
+    SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -no-pie -g -pg -Wsign-compare -Wall -Werror -Wno-unknown-pragmas -Wstrict-prototypes -Wpointer-arith -Wno-char-subscripts -Wno-long-long")
 #    SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c89")
 ELSEIF(MSVC)
     SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W4 /WX /MP /D_CRT_SECURE_NO_WARNINGS /D_USE_MATH_DEFINES")
diff --git a/src/kernel/build.c b/src/kernel/build.c
index f5e1eec91..2b7251f1d 100644
--- a/src/kernel/build.c
+++ b/src/kernel/build.c
@@ -64,6 +64,7 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 /* from libc */
 #include <assert.h>
+#include <errno.h>
 #include <limits.h>
 #include <math.h>
 #include <stdio.h>