Add support for arm64 on freebsd

NEWS.rst

@@ -6,7 +6,7 @@ every change, see the Git log.
 
 Latest
 ------
-* tbd
+* Patch: Fixed compilation error on ARM64 FreeBSD.
 
 9.0.1
 -----

lock_version_resolve.json

@@ -0,0 +1,32 @@
+{
+    "cli11": {
+        "commit_id": "b1003a44f018255c409c43d5f35e71ab8f7eef62",
+        "resolver_info": "2.0.1",
+        "sha1": "fdd606a277e537302216420bd3e9070c6f0df861"
+    },
+    "cli11-source": {
+        "commit_id": "f862849488557eeee0397814a47449ecfdae0383",
+        "resolver_info": "f862849488557eeee0397814a47449ecfdae0383",
+        "sha1": "c907ae8559530944e520e22d1382be32d290ca77"
+    },
+    "gtest": {
+        "commit_id": "da24468d2c5deb601d0f67196abe83d78a00f972",
+        "resolver_info": "5.0.0",
+        "sha1": "11e35e3559b3844fbe2fa6f045854cd2dcdf0f86"
+    },
+    "gtest-source": {
+        "commit_id": "e2239ee6043f73722e7aa812a459f54a28552929",
+        "resolver_info": "release-1.11.0",
+        "sha1": "ca969a1500e88a09de1cbfb8d8d3307a7773abfd"
+    },
+    "platform": {
+        "commit_id": "c2543dd5e613fb86d8dee530c0f1c142a310e1f0",
+        "resolver_info": "5.1.1",
+        "sha1": "f6bc772cf920c024726ebd12a5a38f123d057adb"
+    },
+    "waf-tools": {
+        "commit_id": "6379b83992885dcb148e2c8bf3677f315d623e8f",
+        "resolver_info": "5.4.0",
+        "sha1": "9dd4ab1d52c916572f45237d4e7450abc7c19a14"
+    }
+}

src/cpuid/detail/init_linux_gcc_arm.hpp

@@ -11,9 +11,17 @@
 
 #include <elf.h>
 #include <fcntl.h>
-#include <linux/auxvec.h>
 #include <unistd.h>
 
+// The following includes are needed for the runtime detection of NEON
+#ifdef PLATFORM_FREEBSD
+// FreeBSD uses sys/auxv.h
+#include <sys/auxv.h>
+#else
+// Linux uses linux/auxvec.h
+#include <linux/auxvec.h>
+#endif
+
 #include "cpuinfo_impl.hpp"
 
 namespace cpuid
@@ -30,11 +38,16 @@ void init_cpuinfo(cpuinfo::impl& info)
     info.m_has_neon = true;
 #else
     // Runtime detection of NEON is necessary on 32-bit ARM CPUs
-    //
+
+#ifdef PLATFORM_FREEBSD
+    // On FreeBSD we use the elf_aux_info function to get the HWCAP
+    long hwcap = 0;
+    elf_aux_info(AT_HWCAP, &hwcap, sizeof hwcap);
+    info.m_has_neon = hwcap & HWCAP_NEON;
+#else
     // Follow recommendation from Cortex-A Series Programmer's guide
     // in Section 20.1.7 Detecting NEON. The guide is available at
     // Steinwurf's Google drive: steinwurf/technical/experimental/cpuid
-
     auto cpufile = open("/proc/self/auxv", O_RDONLY);
     assert(cpufile);
 
@@ -59,6 +72,7 @@ void init_cpuinfo(cpuinfo::impl& info)
         info.m_has_neon = false;
     }
 #endif
+#endif
 }
 }
 }