5 files changed, 25 insertions, 0 deletions

diff --git a/src/arch/arch.h b/src/arch/arch.h
index aa4a5c5..c4efbd5 100644
--- a/src/arch/arch.h
+++ b/src/arch/arch.h
@@ -1,3 +1,6 @@
+#ifndef ARCH_ARCH_H
+#define ARCH_ARCH_H
+
 #if defined(AVX2)
 
 #include <immintrin.h>
@@ -36,3 +39,5 @@ typedef struct {
 #endif
 
 #endif
+
+#endif /* ARCH_ARCH_H */
diff --git a/src/arch/avx2.h b/src/arch/avx2.h
index 801419e..5b9ecc7 100644
--- a/src/arch/avx2.h
+++ b/src/arch/avx2.h
@@ -1,3 +1,6 @@
+#ifndef ARCH_AVX2_H
+#define ARCH_AVX2_H
+
 #define CO2_AVX2 _mm256_set_epi64x(0, 0, 0, INT64_C(0x6060606060606060))
 #define COCW_AVX2 _mm256_set_epi64x(0, 0, 0, INT64_C(0x2020202020202020))
 #define CP_AVX2 _mm256_set_epi64x(0, 0, 0, INT64_C(0x0707070707070707))
@@ -478,3 +481,5 @@ invcoord_epudsep(uint64_t i)
 
         return _mm256_or_si256(elow, cube);
 }
+
+#endif /* ARCH_AVX2_H */
diff --git a/src/arch/common.h b/src/arch/common.h
index a7c4a3b..973263f 100644
--- a/src/arch/common.h
+++ b/src/arch/common.h
@@ -1,3 +1,6 @@
+#ifndef ARCH_COMMON_H
+#define ARCH_COMMON_H
+
 #define EOSHIFT     UINT8_C(4)
 #define COSHIFT     UINT8_C(5)
 
@@ -126,3 +129,5 @@ invcoord_epudsep_array(uint64_t c, uint8_t ret[8])
                 k -= is;
         }
 }
+
+#endif /* ARCH_COMMON_H */
diff --git a/src/arch/neon.h b/src/arch/neon.h
index 501b722..faf3b8f 100644
--- a/src/arch/neon.h
+++ b/src/arch/neon.h
@@ -1,3 +1,6 @@
+#ifndef ARCH_NEON_H
+#define ARCH_NEON_H
+
 #define CO2_NEON    vdup_n_u8(0x60)
 #define COCW_NEON   vdup_n_u8(0x20)
 #define EO_NEON     vdupq_n_u8(0x10)
@@ -557,3 +560,5 @@ invcoord_epudsep(uint64_t i)
                 .edge = vcombine_u8(vld1_u8(e), vld1_u8(SOLVED_H))
         };
 }
+
+#endif /* ARCH_NEON_H */
diff --git a/src/arch/portable.h b/src/arch/portable.h
index f1491f0..18fb6b8 100644
--- a/src/arch/portable.h
+++ b/src/arch/portable.h
@@ -1,3 +1,6 @@
+#ifndef ARCH_PORTABLE_H
+#define ARCH_PORTABLE_H
+
 #define STATIC_CUBE(c_ufr, c_ubl, c_dfl, c_dbr, c_ufl, c_ubr, c_dfr, c_dbl, \
     e_uf, e_ub, e_db, e_df, e_ur, e_ul, e_dl, e_dr, e_fr, e_fl, e_bl, e_br) \
     ((cube_t) { \
@@ -407,3 +410,5 @@ invcoord_epudsep(uint64_t c)
         invcoord_epudsep_array(c, ret.edge);
         return ret;
 }
+
+#endif /* ARCH_PORTABLE_H */