libs/libcap-ng/patches/add_library_if_header_found.patch

   1 From 2c855b76362d1027abea967ac253cae8a7c160c3 Mon Sep 17 00:00:00 2001
   2 From: Trevor Woerner <twoerner@gmail.com>
   3 Date: Wed, 6 May 2020 17:38:05 -0400
   4 Subject: [PATCH] configure.ac: add library if header found (#10)
   5
   6 If the pthread.h header is found, make sure library containing
   7 "pthread_atfork" is added to the list of libraries against which to link.
   8 On some hosts (e.g. openSUSE 15.1) "-lpthread" needs to be explicitly added
   9 in order for the code to compile correctly.
  10
  11 Signed-off-by: Trevor Woerner <twoerner@gmail.com>
  12 ---
  13  configure.ac | 4 +++-
  14  1 file changed, 3 insertions(+), 1 deletion(-)
  15
  16 diff --git a/configure.ac b/configure.ac
  17 index 9d6aca3..4fbe4d3 100644
  18 --- a/configure.ac
  19 +++ b/configure.ac
  20 @@ -56,7 +56,9 @@ AC_CHECK_HEADERS(sys/xattr.h, [], [
  21         AC_CHECK_HEADERS(attr/xattr.h, [], [AC_MSG_WARN(attr/xattr.h not found, disabling file system capabilities.)])
  22         ])
  23  AC_CHECK_HEADERS(linux/securebits.h, [], [])
  24 -AC_CHECK_HEADERS(pthread.h, [], [AC_MSG_WARN(pthread.h not found, disabling pthread_atfork.)])
  25 +AC_CHECK_HEADERS(pthread.h,
  26 +       [AC_SEARCH_LIBS(pthread_atfork, pthread)],
  27 +       [AC_MSG_WARN(pthread.h not found, disabling pthread_atfork.)])
  28
  29  AC_C_CONST
  30  AC_C_INLINE