fix compilation under FreeBSD

sys headers must come before libprocstat

meson is missing a libprocstat dependency. iconv is also broken with
meson and freebsd.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

meson.build

@@ -49,6 +49,7 @@ cdata.set('EXV_ENABLE_VIDEO', get_option('video'))
 
 deps = []
 deps += cpp.find_library('ws2_32', required: host_machine.system() == 'windows')
+deps += cpp.find_library('procstat', required: host_machine.system() == 'freebsd')
 
 if cpp.get_argument_syntax() == 'gcc' and cpp.version().version_compare('<9')
   if host_machine.system() == 'linux' and cpp.get_define('_LIBCPP_VERSION', prefix: '#include <new>') == ''
@@ -83,7 +84,7 @@ if zlib_dep.found()
   deps += zlib_dep
 endif
 
-if meson.version().version_compare('>= 0.60')
+if meson.version().version_compare('>= 0.60') and host_machine.system() != 'freebsd'
   iconv_dep = dependency('iconv', disabler: true, required: get_option('iconv'))
 else
   iconv_dep = dependency('', disabler: true, required: false)

src/futils.cpp

@@ -39,7 +39,7 @@ namespace fs = std::experimental::filesystem;
 #endif
 
 #if defined(__FreeBSD__)
-#include <libprocstat.h>
+// clang-format off
 #include <sys/mount.h>
 #include <sys/param.h>
 #include <sys/queue.h>
@@ -47,6 +47,8 @@ namespace fs = std::experimental::filesystem;
 #include <sys/sysctl.h>
 #include <sys/types.h>
 #include <sys/un.h>
+#include <libprocstat.h>
+// clang-format on
 #endif
 
 #ifndef _MAX_PATH

src/version.cpp

@@ -46,12 +46,14 @@
 #elif defined(__APPLE__)
 #include <mach-o/dyld.h>
 #elif defined(__FreeBSD__)
-#include <libprocstat.h>
+// clang-format off
 #include <sys/param.h>
 #include <sys/queue.h>
 #include <sys/socket.h>
 #include <sys/sysctl.h>
 #include <unistd.h>
+#include <libprocstat.h>
+// clang-format on
 #elif defined(__sun__)
 #include <dlfcn.h>
 #include <link.h>