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From: Anssi Kolehmainen <anssi@aketzu.net>
To: linux-gpio@vger.kernel.org
Subject: [libgpiod] AC_FUNC_MALLOC cross-compile failure
Date: Tue, 5 Jan 2021 16:09:10 +0200	[thread overview]
Message-ID: <X/RzBqyV4hCdmrBy@kelvin.aketzu.net> (raw)

When libgpiod is cross-compiled it will use rpl_malloc instead malloc which then 
causes linking failure at later stage.

This happens because AC_FUNC_MALLOC wants to execute malloc() in a live system 
and thus cannot be run at cross-compilation time. libgpiod should just do 
AC_CHECK_FUNC instead.

diff --git a/configure.ac b/configure.ac
index ddb9dc2..5f41c4a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -82,7 +82,7 @@ AC_DEFUN([HEADER_NOT_FOUND_CXX],
  
  # This is always checked (library needs this)
  AC_HEADER_STDC
-AC_FUNC_MALLOC
+AC_CHECK_FUNC([malloc], [], [FUNC_NOT_FOUND_LIB([malloc])])
  AC_CHECK_FUNC([ioctl], [], [FUNC_NOT_FOUND_LIB([ioctl])])
  AC_CHECK_FUNC([asprintf], [], [FUNC_NOT_FOUND_LIB([asprintf])])
  AC_CHECK_FUNC([scandir], [], [FUNC_NOT_FOUND_LIB([scandir])])

             reply	other threads:[~2021-01-05 14:16 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-05 14:09 Anssi Kolehmainen [this message]
2021-01-05 17:24 ` [libgpiod] AC_FUNC_MALLOC cross-compile failure Andy Shevchenko
2021-01-05 19:52   ` Anssi Kolehmainen
2021-01-06  7:19     ` Bartosz Golaszewski
2021-01-06  7:21 ` Bartosz Golaszewski

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