diff --git a/CMakeLists.txt b/CMakeLists.txt
index 06f39a0..fc6db85 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,11 +72,6 @@ if(CMAKE_C_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
 endif()
 
 test_big_endian(CPU_IS_BIG_ENDIAN)
-if(CPU_IS_BIG_ENDIAN)
-  set(CPU_IS_LITTLE_ENDIAN 0)
-else()
-  set(CPU_IS_LITTLE_ENDIAN 1)
-endif()
 
 check_include_file(stdbool.h HAVE_STDBOOL_H)
 check_include_file(unistd.h HAVE_UNISTD_H)
diff --git a/config.h.cmake b/config.h.cmake
index ec3229f..92e91cd 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -15,9 +15,6 @@
 /* Target processor is big endian. */
 #cmakedefine01 CPU_IS_BIG_ENDIAN
 
-/* Target processor is little endian. */
-#cmakedefine01 CPU_IS_LITTLE_ENDIAN
-
 /* Define to 1 if you have the `alarm' function. */
 #cmakedefine01 HAVE_ALARM
 
@@ -27,12 +24,6 @@
 /* Set to 1 if you have libfftw3. */
 #cmakedefine01 HAVE_FFTW3
 
-/* Define if you have C99's lrint function. */
-#cmakedefine01 HAVE_LRINT
-
-/* Define if you have C99's lrintf function. */
-#cmakedefine01 HAVE_LRINTF
-
 /* Define to 1 if you have the <immintrin.h> header file. */
 #cmakedefine HAVE_IMMINTRIN_H
 
@@ -48,9 +39,6 @@
 /* Define to 1 if you have the <stdbool.h> header file. */
 #cmakedefine HAVE_STDBOOL_H
 
-/* Define to 1 if you have the <stdint.h> header file. */
-#cmakedefine01 HAVE_STDINT_H
-
 /* Define to 1 if you have the <sys/times.h> header file. */
 #cmakedefine01 HAVE_SYS_TIMES_H
 
@@ -69,8 +57,3 @@
 /* define best samplerate convertor */
 #cmakedefine ENABLE_SINC_BEST_CONVERTER
 
-/* The size of `int', as computed by sizeof. */
-#define SIZEOF_INT ${SIZEOF_INT}
-
-/* The size of `long', as computed by sizeof. */
-#define SIZEOF_LONG ${SIZEOF_LONG}