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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 */
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