[PATCH v4 1/2] Fix __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__

[James Clarke <jrtc27 at jrtc27 dot com>]

Previously, this macro had taken the form 10X0, where X is the minor
version number, e.g. 1090 for OS X 10.9 Mavericks. However, as of OS X
10.10 Yosemite, it should take the form 10XX00, i.e. 101000 for 10.10.

Added a test for the new format and fixed the formatting for the
existing ones.

gcc/ChangeLog:

    * config/darwin-c.c (version_as_macro): Added extra 0 for OS X 10.10
    and above
    * config/darwin-driver.c (darwin_find_version_from_kernel): Removed
    kernel version check to avoid incrementing it after every major OS X
    release

gcc/testsuite/ChangeLog:

    * gcc.db/darwin-minversion-1.c: Fixed formatting
    * gcc.db/darwin-minversion-2.c: Fixed formatting
    * gcc.db/darwin-minversion-3.c: Fixed formatting
    * gcc.dg/darwin-minversion-4.c: Added test for OS X 10.10
---
 gcc/config/darwin-c.c                      | 25 +++++++++++++++++++------
 gcc/config/darwin-driver.c                 |  2 --
 gcc/testsuite/gcc.dg/darwin-minversion-1.c |  3 ++-
 gcc/testsuite/gcc.dg/darwin-minversion-2.c |  3 ++-
 gcc/testsuite/gcc.dg/darwin-minversion-3.c |  3 ++-
 gcc/testsuite/gcc.dg/darwin-minversion-4.c | 12 ++++++++++++
 6 files changed, 37 insertions(+), 11 deletions(-)
 create mode 100644 gcc/testsuite/gcc.dg/darwin-minversion-4.c

diff --git a/gcc/config/darwin-c.c b/gcc/config/darwin-c.c
index 892ba35..7fe4b1f 100644
--- a/gcc/config/darwin-c.c
+++ b/gcc/config/darwin-c.c
@@ -571,21 +571,34 @@ find_subframework_header (cpp_reader *pfile, const char *header, cpp_dir **dirp)
 }
 
 /* Return the value of darwin_macosx_version_min suitable for the
-   __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ macro,
-   so '10.4.2' becomes 1040.  The lowest digit is always zero.
+   __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ macro, so '10.4.2'
+   becomes 1040 and '10.10.0' becomes 101000.  The lowest digit is
+   always zero, as is the second lowest for '10.10.x' and above.
    Print a warning if the version number can't be understood.  */
 static const char *
 version_as_macro (void)
 {
-  static char result[] = "1000";
+  static char result[7] = "1000";
+  int minorDigitIdx;
 
   if (strncmp (darwin_macosx_version_min, "10.", 3) != 0)
     goto fail;
   if (! ISDIGIT (darwin_macosx_version_min[3]))
     goto fail;
-  result[2] = darwin_macosx_version_min[3];
-  if (darwin_macosx_version_min[4] != '\0'
-      && darwin_macosx_version_min[4] != '.')
+
+  minorDigitIdx = 3;
+  result[2] = darwin_macosx_version_min[minorDigitIdx++];
+  if (ISDIGIT (darwin_macosx_version_min[minorDigitIdx]))
+  {
+    /* Starting with OS X 10.10, the macro ends '00' rather than '0',
+       i.e. 10.10.x becomes 101000 rather than 10100.  */
+    result[3] = darwin_macosx_version_min[minorDigitIdx++];
+    result[4] = '0';
+    result[5] = '0';
+    result[6] = '\0';
+  }
+  if (darwin_macosx_version_min[minorDigitIdx] != '\0'
+      && darwin_macosx_version_min[minorDigitIdx] != '.')
     goto fail;
 
   return result;
diff --git a/gcc/config/darwin-driver.c b/gcc/config/darwin-driver.c
index 8b6ae93..eb478e8 100644
--- a/gcc/config/darwin-driver.c
+++ b/gcc/config/darwin-driver.c
@@ -57,8 +57,6 @@ darwin_find_version_from_kernel (char *new_flag)
   version_p = osversion + 1;
   if (ISDIGIT (*version_p))
     major_vers = major_vers * 10 + (*version_p++ - '0');
-  if (major_vers > 4 + 9)
-    goto parse_failed;
   if (*version_p++ != '.')
     goto parse_failed;
   version_pend = strchr(version_p, '.');
diff --git a/gcc/testsuite/gcc.dg/darwin-minversion-1.c b/gcc/testsuite/gcc.dg/darwin-minversion-1.c
index d8a3243..6221d61 100644
--- a/gcc/testsuite/gcc.dg/darwin-minversion-1.c
+++ b/gcc/testsuite/gcc.dg/darwin-minversion-1.c
@@ -2,7 +2,8 @@
 /* { dg-options "-mmacosx-version-min=10.1" } */
 /* { dg-do run { target *-*-darwin* } } */
 
-int main(void)
+int
+main ()
 {
 #if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ != 1010
   fail me;
diff --git a/gcc/testsuite/gcc.dg/darwin-minversion-2.c b/gcc/testsuite/gcc.dg/darwin-minversion-2.c
index fd4975a..8e18d52 100644
--- a/gcc/testsuite/gcc.dg/darwin-minversion-2.c
+++ b/gcc/testsuite/gcc.dg/darwin-minversion-2.c
@@ -2,7 +2,8 @@
 /* { dg-options "-mmacosx-version-min=10.1 -mmacosx-version-min=10.3" } */
 /* { dg-do run { target *-*-darwin* } } */
 
-int main(void)
+int
+main ()
 {
 #if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ != 1030
   fail me;
diff --git a/gcc/testsuite/gcc.dg/darwin-minversion-3.c b/gcc/testsuite/gcc.dg/darwin-minversion-3.c
index d0c5934..4fcb969 100644
--- a/gcc/testsuite/gcc.dg/darwin-minversion-3.c
+++ b/gcc/testsuite/gcc.dg/darwin-minversion-3.c
@@ -2,7 +2,8 @@
 /* { dg-options "-mmacosx-version-min=10.4.10" } */
 /* { dg-do compile { target *-*-darwin* } } */
 
-int main(void)
+int
+main ()
 {
 #if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ != 1040
   fail me;
diff --git a/gcc/testsuite/gcc.dg/darwin-minversion-4.c b/gcc/testsuite/gcc.dg/darwin-minversion-4.c
new file mode 100644
index 0000000..1cb42eb
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/darwin-minversion-4.c
@@ -0,0 +1,12 @@
+/* Test that major versions greater than 9 work and have the additional 0.  */
+/* { dg-options "-mmacosx-version-min=10.10.0" } */
+/* { dg-do compile { target *-*-darwin* } } */
+
+int
+main ()
+{
+#if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ != 101000
+  fail me;
+#endif
+  return 0;
+}
-- 
2.1.0