git: 0bcd49c13ada - main - Work around bogus old gcc "initializer element is not constant" error

[Dimitry Andric]

The branch main has been updated by dim:

URL: https://cgit.FreeBSD.org/src/commit/?id=0bcd49c13ada1461bcea85e0466811ddcb290b5e

commit 0bcd49c13ada1461bcea85e0466811ddcb290b5e
Author:     Dimitry Andric <dim at FreeBSD.org>
AuthorDate: 2021-06-25 18:42:38 +0000
Commit:     Dimitry Andric <dim at FreeBSD.org>
CommitDate: 2021-06-25 18:43:20 +0000

    Work around bogus old gcc "initializer element is not constant" error
    
    After df3b437c1e073eb83e9a93af1c417f3ee8d0de3b, older gcc's such as
    4.2.1 (still used on earlier branches for e.g. mips and powerpc) and
    6.3.0 (still used for some cross-builds) started throwing bogus errors
    like:
    
    In file included from /workspace/src/lib/msun/src/s_llround.c:11:0:
    /workspace/src/lib/msun/src/s_lround.c:54:31: error: initializer element is not constant
     static const type dtype_min = type_min - 0.5;
                                   ^~~~~~~~
    /workspace/src/lib/msun/src/s_lround.c:55:31: error: initializer element is not constant
     static const type dtype_max = type_max + 0.5;
                                   ^~~~~~~~
    
    Since 'type_min' and 'type_max' are constants declared just above these
    lines this error is nonsensical, but older gcc's are not smart enough.
    
    Work around the error by reusing the (type)DTYPE_MIN and (type)DTYPE_MAX
    macros, so I can MFC this right away, unbreaking a few stable builds.
    
    MFC after:      immediately
---
 lib/msun/src/s_lround.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/msun/src/s_lround.c b/lib/msun/src/s_lround.c
index c4d305401ac8..1dd8e697f703 100644
--- a/lib/msun/src/s_lround.c
+++ b/lib/msun/src/s_lround.c
@@ -51,8 +51,8 @@ __FBSDID("$FreeBSD$");
  */
 static const type type_min = (type)DTYPE_MIN;
 static const type type_max = (type)DTYPE_MAX;
-static const type dtype_min = type_min - 0.5;
-static const type dtype_max = type_max + 0.5;
+static const type dtype_min = (type)DTYPE_MIN - 0.5;
+static const type dtype_max = (type)DTYPE_MAX + 0.5;
 #define	INRANGE(x)	(dtype_max - type_max != 0.5 || \
 			 ((x) > dtype_min && (x) < dtype_max))