Make deps: Compile own version of nasm for Apple

The upstream version of nasm does not put version information to the
generated object files, which makes linker to show the following
warning:

  building for macOS, but linking in object file

Using own patched version of nasm which puts required information to
the object file, making linker happy.

The plan is to either streamline the patch and provide it to the
upstream, or, it that takes too long, get an independent fix from the
upstream.

6 files changed, 176 insertions, 0 deletions

diff --git a/build_files/build_environment/CMakeLists.txt b/build_files/build_environment/CMakeLists.txt
index 876372ca8c4..7e7c5d58d71 100644
--- a/build_files/build_environment/CMakeLists.txt
+++ b/build_files/build_environment/CMakeLists.txt
@@ -76,6 +76,7 @@ include(cmake/llvm.cmake)
 include(cmake/clang.cmake)
 if(APPLE)
   include(cmake/openmp.cmake)
+  include(cmake/nasm.cmake)
 endif()
 include(cmake/openimageio.cmake)
 include(cmake/tiff.cmake)
diff --git a/build_files/build_environment/cmake/ffmpeg.cmake b/build_files/build_environment/cmake/ffmpeg.cmake
index 02e78c605af..7b759ab8f1d 100644
--- a/build_files/build_environment/cmake/ffmpeg.cmake
+++ b/build_files/build_environment/cmake/ffmpeg.cmake
@@ -143,6 +143,12 @@ if(WIN32)
     external_zlib_mingw
   )
 endif()
+if(APPLE)
+  add_dependencies(
+    external_ffmpeg
+    external_nasm
+  )
+endif()
 
 if(BUILD_MODE STREQUAL Release AND WIN32)
   ExternalProject_Add_Step(external_ffmpeg after_install
diff --git a/build_files/build_environment/cmake/nasm.cmake b/build_files/build_environment/cmake/nasm.cmake
new file mode 100644
index 00000000000..51d7ebd8830
--- /dev/null
+++ b/build_files/build_environment/cmake/nasm.cmake
@@ -0,0 +1,29 @@
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+ExternalProject_Add(external_nasm
+  URL ${NASM_URI}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  URL_HASH SHA256=${NASM_HASH}
+  PREFIX ${BUILD_DIR}/nasm
+  PATCH_COMMAND ${PATCH_CMD} --verbose -p 1 -N -d ${BUILD_DIR}/nasm/src/external_nasm < ${PATCH_DIR}/nasm.diff
+  CONFIGURE_COMMAND ${CONFIGURE_ENV} && cd ${BUILD_DIR}/nasm/src/external_nasm/ && ${CONFIGURE_COMMAND} --prefix=${LIBDIR}/nasm
+  BUILD_COMMAND ${CONFIGURE_ENV} && cd ${BUILD_DIR}/nasm/src/external_nasm/ && make -j${MAKE_THREADS}
+  INSTALL_COMMAND ${CONFIGURE_ENV} && cd ${BUILD_DIR}/nasm/src/external_nasm/ && make install
+  INSTALL_DIR ${LIBDIR}/nasm
+)
diff --git a/build_files/build_environment/cmake/versions.cmake b/build_files/build_environment/cmake/versions.cmake
index 5ec5553079c..ce2a1191f17 100644
--- a/build_files/build_environment/cmake/versions.cmake
+++ b/build_files/build_environment/cmake/versions.cmake
@@ -305,6 +305,10 @@ set(MESA_VERSION 18.3.1)
 set(MESA_URI ftp://ftp.freedesktop.org/pub/mesa//mesa-${MESA_VERSION}.tar.xz)
 set(MESA_HASH d60828056d77bfdbae0970f9b15fb1be)
 
+set(NASM_VERSION 2.15.02)
+set(NASM_URI https://www.nasm.us/pub/nasm/releasebuilds/${NASM_VERSION}/nasm-${NASM_VERSION}.tar.xz)
+set(NASM_HASH f4fd1329b1713e1ccd34b2fc121c4bcd278c9f91cc4cb205ae8fcd2e4728dd14)
+
 set(XR_OPENXR_SDK_VERSION 1.0.8)
 set(XR_OPENXR_SDK_URI https://github.com/KhronosGroup/OpenXR-SDK/archive/release-${XR_OPENXR_SDK_VERSION}.tar.gz)
 set(XR_OPENXR_SDK_HASH c6de63d2e0f9029aa58dfa97cad8ce07)
diff --git a/build_files/build_environment/cmake/x264.cmake b/build_files/build_environment/cmake/x264.cmake
index 8bcb5a2938f..62a46254a99 100644
--- a/build_files/build_environment/cmake/x264.cmake
+++ b/build_files/build_environment/cmake/x264.cmake
@@ -39,3 +39,10 @@ ExternalProject_Add(external_x264
 if(MSVC)
   set_target_properties(external_x264 PROPERTIES FOLDER Mingw)
 endif()
+
+if(APPLE)
+  add_dependencies(
+    external_x264
+    external_nasm
+  )
+endif()
diff --git a/build_files/build_environment/patches/nasm.diff b/build_files/build_environment/patches/nasm.diff
new file mode 100644
index 00000000000..821e1a1d905
--- /dev/null
+++ b/build_files/build_environment/patches/nasm.diff
@@ -0,0 +1,129 @@
+diff --git a/output/macho.h b/output/macho.h
+index 538c531e..fd5e8849 100644
+--- a/output/macho.h
++++ b/output/macho.h
+@@ -60,6 +60,8 @@
+ #define LC_SEGMENT			0x1
+ #define LC_SEGMENT_64			0x19
+ #define LC_SYMTAB			0x2
++#define LC_VERSION_MIN_MACOSX		0x24
++#define LC_BUILD_VERSION		0x32
+ 
+ /* Symbol type bits */
+ #define N_STAB				0xe0
+diff --git a/output/outmacho.c b/output/outmacho.c
+index 08147883..de6ec902 100644
+--- a/output/outmacho.c
++++ b/output/outmacho.c
+@@ -38,6 +38,8 @@
+ 
+ #include "compiler.h"
+ 
++#include <stdlib.h>
++
+ #include "nctype.h"
+ 
+ #include "nasm.h"
+@@ -64,6 +66,8 @@
+ #define MACHO_SYMCMD_SIZE		24
+ #define MACHO_NLIST_SIZE		12
+ #define MACHO_RELINFO_SIZE		8
++#define MACHO_BUILD_VERSION_SIZE	24
++#define MACHO_VERSION_MIN_MACOSX_SIZE	16
+ 
+ #define MACHO_HEADER64_SIZE		32
+ #define MACHO_SEGCMD64_SIZE		72
+@@ -1224,6 +1228,46 @@ static void macho_layout_symbols (uint32_t *numsyms,
+     }
+ }
+ 
++static bool get_full_version_from_env (const char *variable_name,
++                                       int *r_major,
++                                       int *r_minor,
++                                       int *r_patch)  {
++    *r_major = 0;
++    *r_minor = 0;
++    *r_patch = 0;
++
++    const char *value = getenv(variable_name);
++    if (value == NULL || value[0] == '\0') {
++        return false;
++    }
++
++    const char *current_value = value;
++    const char *end_value = value + strlen(value);
++
++    char *endptr;
++
++    *r_major = strtol(current_value, &endptr, 10);
++    if (endptr >= end_value) {
++        return true;
++    }
++    current_value = endptr + 1;
++
++    *r_minor = strtol(current_value, &endptr, 10);
++    if (endptr >= end_value) {
++        return true;
++    }
++    current_value = endptr + 1;
++
++    *r_patch = strtol(current_value, &endptr, 10);
++
++    return true;
++}
++
++static bool need_version_min_macosx_command (void) {
++    return getenv("MACOSX_DEPLOYMENT_TARGET") &&
++           getenv("MACOSX_SDK_VERSION");
++}
++
+ /* Calculate some values we'll need for writing later.  */
+ 
+ static void macho_calculate_sizes (void)
+@@ -1270,6 +1314,12 @@ static void macho_calculate_sizes (void)
+         head_sizeofcmds += fmt.segcmd_size  + seg_nsects * fmt.sectcmd_size;
+     }
+ 
++    /* LC_VERSION_MIN_MACOSX */
++    if (need_version_min_macosx_command()) {
++	++head_ncmds;
++	head_sizeofcmds += MACHO_VERSION_MIN_MACOSX_SIZE;
++    }
++
+     if (nsyms > 0) {
+ 	++head_ncmds;
+ 	head_sizeofcmds += MACHO_SYMCMD_SIZE;
+@@ -1653,6 +1703,33 @@ static void macho_write (void)
+     else
+         nasm_warn(WARN_OTHER, "no sections?");
+ 
++#define ENCODE_BUILD_VERSION(major, minor, patch) \
++    (((major) << 16) | ((minor) << 8) | (patch))
++
++    if (0) {
++        fwriteint32_t(LC_BUILD_VERSION, ofile); /* cmd == LC_BUILD_VERSION */
++        fwriteint32_t(MACHO_BUILD_VERSION_SIZE, ofile); /* size of load command */
++        fwriteint32_t(1, ofile);    /* platform */
++        fwriteint32_t(ENCODE_BUILD_VERSION(10, 13, 0), ofile);    /* minos, X.Y.Z is encoded in nibbles xxxx.yy.zz */
++        fwriteint32_t(ENCODE_BUILD_VERSION(10, 15, 4), ofile);    /* sdk, X.Y.Z is encoded in nibbles xxxx.yy.zz */
++        fwriteint32_t(0, ofile);    /* number of tool entries following this */
++    }
++
++    if (need_version_min_macosx_command()) {
++        int sdk_major, sdk_minor, sdk_patch;
++        get_full_version_from_env("MACOSX_SDK_VERSION", &sdk_major, &sdk_minor, &sdk_patch);
++
++        int version_major, version_minor, version_patch;
++        get_full_version_from_env("MACOSX_DEPLOYMENT_TARGET", &version_major, &version_minor, &version_patch);
++
++        fwriteint32_t(LC_VERSION_MIN_MACOSX, ofile); /* cmd == LC_VERSION_MIN_MACOSX */
++        fwriteint32_t(MACHO_VERSION_MIN_MACOSX_SIZE, ofile); /* size of load command */
++        fwriteint32_t(ENCODE_BUILD_VERSION(version_major, version_minor, version_patch), ofile);    /* minos, X.Y.Z is encoded in nibbles xxxx.yy.zz */
++        fwriteint32_t(ENCODE_BUILD_VERSION(sdk_major, sdk_minor, sdk_patch), ofile);    /* sdk, X.Y.Z is encoded in nibbles xxxx.yy.zz */
++    }
++
++#undef ENCODE_BUILD_VERSION
++
+     if (nsyms > 0) {
+         /* write out symbol command */
+         fwriteint32_t(LC_SYMTAB, ofile); /* cmd == LC_SYMTAB */