libxml2: restrict _POSIX_C_SOURCE to Linux
Fix build breakage with FreeBSD, where some definitions were then hidden by __BSD_VISIBLE not being defined, e.g.: CC libxml2_la-nanohttp.lo nanohttp.c:837:20: error: use of undeclared identifier 'PF_INET6' s = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP); ^ nanohttp.c:842:20: error: use of undeclared identifier 'PF_INET' s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); ^ 2 errors generated. (Tested on FreeBSD 14 and Fedora Linux 39.)
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@ -1,4 +1,4 @@
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# $NetBSD: Makefile,v 1.178 2024/01/27 21:07:16 sjmulder Exp $
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# $NetBSD: Makefile,v 1.179 2024/01/30 00:12:48 gutteridge Exp $
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.include "../../textproc/libxml2/Makefile.common"
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@ -23,7 +23,7 @@ USE_LANGUAGES+= c
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FORCE_C_STD= c99
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# for struct addrinfo on glibc
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CPPFLAGS+= -D_POSIX_C_SOURCE=200112L
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CPPFLAGS.Linux+= -D_POSIX_C_SOURCE=200112L
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TEST_TARGET= check
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