linux-ext4 - e2fsprogs v1.44.4 build failure with musl libc

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Date:   Thu, 13 Sep 2018 22:43:41 +0300
From:   Baruch Siach <baruch@...s.co.il>
To:     Theodore Ts'o <tytso@....edu>
Cc:     linux-ext4@...r.kernel.org, Li Dongyang <dongyangli@....com>
Subject: e2fsprogs v1.44.4 build failure with musl libc

Hi Ted,

Commit fddc423dc6353 (Fix compile error and warnings for old gcc
versions) introduced usage of __GNUC_PREREQ. musl libc does not provide
this macro. So build with musl is broken:

In file included from ../../lib/ext2fs/ext2fs.h:97:0,
                 from feature.c:20:
../../lib/ext2fs/hashmap.h:20:19: error: missing binary operator before token "("
 #if __GNUC_PREREQ (4, 8)
                   ^
../../lib/ext2fs/hashmap.h:25:19: error: missing binary operator before token "("
 #if __GNUC_PREREQ (4, 8)
                   ^

Not sure what is the right fix. I could not find a suitable place for a
local __GNUC_PREREQ definition. Open coding __GNUC_PREREQ everywhere is
quite ugly.

Any other idea?

Thanks,
baruch

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
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