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build: Detect Windows/MinGW at configure time

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Extend the host OS checks to define an OS_WINDOWS automake conditional if
the host is MinGW-like. This will be useful for future Windows-specific
build tweaks.

[guillem@hadrons.org:
 - Rename WINDOWS conditional to OS_WINDOWS. ]

Signed-off-by: Guillem Jover <guillem@hadrons.org>
This commit is contained in:
Aaron Dierking 2018-06-14 11:38:32 -07:00 committed by Guillem Jover
parent 2e071c3cc1
commit 4bed48398f
1 changed files with 5 additions and 0 deletions
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5
configure.ac
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@ -44,6 +44,7 @@ AC_SUBST([TESTU01_LIBS])
AM_CONDITIONAL([HAVE_LIBTESTU01],
[test "x$ac_cv_lib_testu01_unif01_CreateExternGenBits" = "xyes"])
is_windows=no
AS_CASE([$host_os],
[*-gnu*], [
# In old glibc versions (< 2.17) clock_gettime() is in librt.
@ -60,7 +61,11 @@ AS_CASE([$host_os],
# Upstream refuses to define this, we will do it ourselves then.
AC_DEFINE([__MUSL__], [1], [Define to 1 if we are building for musl])
],
[mingw*], [
is_windows=yes
],
)
AM_CONDITIONAL([OS_WINDOWS], [test "x$is_windows" = "xyes"])
# Checks for header files.
AC_CHECK_HEADERS([sys/ndir.h sys/dir.h ndir.h dirent.h grp.h])