From 6255c4e0533961e8e9989a53071a38b6bd6949dd Mon Sep 17 00:00:00 2001
From: "Justin M. Keyes" <justinkz@gmail.com>
Date: Sun, 21 May 2017 13:44:02 +0200
Subject: [PATCH 1/3] build: FreeBSD: Disable -Wc11-extensions only for clang

From FreeBSD ports patch:
https://svnweb.freebsd.org/ports/head/editors/neovim/files/patch-CMakeLists.txt?revision=425833&view=markup

References #4363
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ab7595eb11..3e296308d8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -228,7 +228,7 @@ else()
 
   # On FreeBSD 64 math.h uses unguarded C11 extension, which taints clang
   # 3.4.1 used there.
-  if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+  if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" AND CMAKE_C_COMPILER_ID MATCHES "Clang")
     add_definitions(-Wno-c11-extensions)
   endif()
 endif()

From 17a46dc5e0c814e8c5581fc3b62d67f7e5961670 Mon Sep 17 00:00:00 2001
From: "Justin M. Keyes" <justinkz@gmail.com>
Date: Sun, 21 May 2017 13:47:39 +0200
Subject: [PATCH 2/3] pty_process_unix.c: include <libutil.h> on DragonFly BSD

From FreeBSD ports patch:
https://svnweb.freebsd.org/ports/head/editors/neovim/files/patch-src_nvim_os_pty__process__unix.c?revision=425833&view=markup

References https://github.com/neovim/neovim/issues/6771#issuecomment-302921368
---
 src/nvim/os/pty_process_unix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/nvim/os/pty_process_unix.c b/src/nvim/os/pty_process_unix.c
index eb9335b03c..ee3ab96a83 100644
--- a/src/nvim/os/pty_process_unix.c
+++ b/src/nvim/os/pty_process_unix.c
@@ -12,7 +12,7 @@
 #include <sys/ioctl.h>
 
 // forkpty is not in POSIX, so headers are platform-specific
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined (__DragonFly__)
 # include <libutil.h>
 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
 # include <util.h>

From a84926763f153ee2a97c1882223ecf925c05ba78 Mon Sep 17 00:00:00 2001
From: "Justin M. Keyes" <justinkz@gmail.com>
Date: Sun, 21 May 2017 14:05:38 +0200
Subject: [PATCH 3/3] install: bsd: install manpages to /usr/local/man

https://svnweb.freebsd.org/ports/head/editors/neovim/Makefile?revision=428479&view=markup#l28

Closes #6771
---
 CMakeLists.txt             | 1 -
 cmake/InstallHelpers.cmake | 9 +++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3e296308d8..b67f75576b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -460,7 +460,6 @@ include(InstallHelpers)
 file(GLOB MANPAGES
   RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
   man/nvim.1)
-
 install_helper(
   FILES ${MANPAGES}
   DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
diff --git a/cmake/InstallHelpers.cmake b/cmake/InstallHelpers.cmake
index ee07ba2c66..ca20ddf354 100644
--- a/cmake/InstallHelpers.cmake
+++ b/cmake/InstallHelpers.cmake
@@ -1,3 +1,12 @@
+# Fix CMAKE_INSTALL_MANDIR on BSD before including GNUInstallDirs. #6771
+if(CMAKE_SYSTEM_NAME MATCHES "BSD" AND NOT DEFINED CMAKE_INSTALL_MANDIR)
+  if(DEFINED ENV{MANPREFIX})
+    set(CMAKE_INSTALL_MANDIR "$ENV{MANPREFIX}/man")
+  else()
+    set(CMAKE_INSTALL_MANDIR "/usr/local/man")
+  endif()
+endif()
+
 # For $CMAKE_INSTALL_{DATAROOT,MAN, ...}DIR
 include(GNUInstallDirs)