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BUILD: compiler: undefine the CONCAT() macro if already defined

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As Ilya reported in issue #2911, the CONCAT() macro breaks on NetBSD
which defines its own as __CONCAT() (which is exactly the same). Let's
just undefine it before ours to fix the issue instead of renaming, but
keep ours so that we don't have doubts about what we're running with.

Note that the patch introducing this breaking change was backported
to 3.0.
This commit is contained in:
Willy Tarreau 2025-04-02 11:36:43 +02:00
parent a703eeaef7
commit 4ec5509541
1 changed files with 1 additions and 0 deletions
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include/haproxy/compiler.h
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@ -284,6 +284,7 @@
#define TOSTR(x) _TOSTR(x)
/* concatenates the two strings after resolving possible macros */
#undef CONCAT // Turns out NetBSD defines it to the same in exec_elf.h
#define _CONCAT(a,b) a ## b
#define CONCAT(a,b) _CONCAT(a,b)