make it buildable at FreeBSD

CMakeLists.txt

@@ -177,7 +177,7 @@ set(CPACK_PACKAGE_DESCRIPTION
 execute_process(COMMAND uname -m
 	OUTPUT_VARIABLE ARCH OUTPUT_STRIP_TRAILING_WHITESPACE)
 
-if(UNIX AND NOT APPLE) # on linux
+if(CMAKE_HOST_SYSTEM_NAME STREQUAL Linux)
 	execute_process(COMMAND
 		bash "-c" "cat /etc/os-release|grep '^ID='|cut -d '=' -f 2|tr -d '\"'"
 		OUTPUT_VARIABLE DIST_NAME OUTPUT_STRIP_TRAILING_WHITESPACE)

src/fileops.c

@@ -329,7 +329,7 @@ int mscp_glob(const char *pattern, int flags, glob_t *pglob, sftp_session sftp)
 #else
 		flags |= GLOB_ALTDIRFUNC;
 		set_tls_sftp_session(sftp);
-#ifdef __APPLE__
+#if defined(__APPLE__) || defined(__FreeBSD__)
 		pglob->gl_opendir = (void *(*)(const char *))mscp_opendir_wrapped;
 		pglob->gl_readdir = (struct dirent *(*)(void *))mscp_readdir;
 		pglob->gl_closedir = (void (*)(void *))mscp_closedir;

src/platform.c

@@ -7,6 +7,10 @@
 #define _GNU_SOURCE
 #include <sched.h>
 #include <stdlib.h>
+#elif __FreeBSD__
+#include <stdlib.h>
+#include <unistd.h>
+#include <pthread_np.h>
 #else
 #error unsupported platform
 #endif
@@ -78,6 +82,17 @@ int nr_cpus()
 		return CPU_COUNT(&cpu_set);
 	return -1;
 }
+#endif
+
+#ifdef __FreeBSD__
+int nr_cpus()
+{
+	long nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+	return nr_cpus;
+}
+#endif
+
+#if defined(linux) || defined(__FreeBSD__)
 
 int set_thread_affinity(pthread_t tid, int core)
 {