From: Charles Bailey Date: Wed, 24 Jun 2015 22:12:07 GMT Subject: [PATCH v2] Fix definition of ARRAY_SIZE for non-gcc builds Message-ID: <1435183927-21217-1-git-send-email-charles@hashpling.org> In-Reply-To: <1435131867-11361-1-git-send-email-charles@hashpling.org> From: Charles Bailey The improved ARRAY_SIZE macro uses BARF_UNLESS_AN_ARRAY which is expands to a valid check for recent gcc versions and to 0 for older gcc versions but is not defined on non-gcc builds. Non-gcc builds need this macro to expand to 0 as well. The current outer test (defined(__GNUC__) && (__GNUC__ >= 3)) is a strictly weaker condition than the inner test (GIT_GNUC_PREREQ(3, 1)) so we can omit the outer test and cause the BARF_UNLESS_AN_ARRAY macro to be defined correctly on non-gcc builds as well as gcc builds with older versions. Signed-off-by: Charles Bailey --- This resend fixes a copy and paste error in the outer test in the commit message. The patch remains the same. This fixes a build regression introduced in v2.4.4 so this patch is based off maint. git-compat-util.h | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/git-compat-util.h b/git-compat-util.h index b45c75f..8c2b7aa 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -58,15 +58,13 @@ #define BUILD_ASSERT_OR_ZERO(cond) \ (sizeof(char [1 - 2*!(cond)]) - 1) -#if defined(__GNUC__) && (__GNUC__ >= 3) -# if GIT_GNUC_PREREQ(3, 1) +#if GIT_GNUC_PREREQ(3, 1) /* &arr[0] degrades to a pointer: a different type from an array */ # define BARF_UNLESS_AN_ARRAY(arr) \ BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \ __typeof__(&(arr)[0]))) -# else -# define BARF_UNLESS_AN_ARRAY(arr) 0 -# endif +#else +# define BARF_UNLESS_AN_ARRAY(arr) 0 #endif /* * ARRAY_SIZE - get the number of elements in a visible array -- 2.4.0.53.g8440f74