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Don't use AC_LANG_SOURCE for conftest.h source

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Using AC_LANG_SOURCE with some versions of autoconf is problematic if
the given source is to be written to a header file. Such versions assume
the contents are to be written to conftest.c and generate shell code to
that effect. The contents of the test program to detect support for
Linux tracepoints were consequently malformed (containing the source for
conftest.h) so the build system incorrectly disabled tracepoints
support. Fix this in ZFS_LINUX_TRY_COMPILE_HEADER by passing the header
source directly to ZFS_LINUX_COMPILE_IFELSE.

Signed-off-by: Ned Bass <bass6@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2953
This commit is contained in:
Ned Bass 2014-12-15 13:53:00 -08:00 committed by Brian Behlendorf
parent 49ee64e5e6
commit 4e30e68caf
1 changed files with 1 additions and 1 deletions
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config/kernel.m4
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@ -649,5 +649,5 @@ AC_DEFUN([ZFS_LINUX_TRY_COMPILE_HEADER],
[AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
[modules],
[test -s build/conftest.o],
[$3], [$4], [AC_LANG_SOURCE([$5])])
[$3], [$4], [$5])
])