[commit: packages/unix] master: Android doesn’t have mkstemps (b5b6253)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/unix

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/b5b62536e80344db4468d12fc6ded9fb4bc52be0/unix

>---------------------------------------------------------------

commit b5b62536e80344db4468d12fc6ded9fb4bc52be0
Author: Moritz Angermann <moritz.angermann at gmail.com>
Date:   Tue May 9 15:49:43 2017 +0800

    Android doesn’t have mkstemps
    
    However the check similarly to tell and seekdir succeeds. However we will generate the following error down the line:
    ```
    /var/folders/fv/xqjrpfj516n5xq_m_ljpsjx00000gn/T/ghc13524_0/ghc_2.c:11:104: error:
         warning: implicit declaration of function 'mkstemps' is invalid in C99 [-Wimplicit-function-declaration]
       |
    11 | HsInt32 ghczuwrapperZC1ZCunixzm2zi7zi2zi1ZCSystemziPosixziTempZCmkstemps(void* a1, HsInt32 a2) {return mkstemps(a1, a2);}
       |                                                                                                        ^
    HsInt32 ghczuwrapperZC1ZCunixzm2zi7zi2zi1ZCSystemziPosixziTempZCmkstemps(void* a1, HsInt32 a2) {return mkstemps(a1, a2);}
                                                                                                           ^
    ```


>---------------------------------------------------------------

b5b62536e80344db4468d12fc6ded9fb4bc52be0
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 32f7174..b23caef 100644
--- a/configure.ac
+++ b/configure.ac
@@ -73,7 +73,8 @@ AC_CHECK_FUNCS([utimensat futimens])
 AC_CHECK_FUNCS([lutimes futimes])
 
 # Additional temp functions
-AC_CHECK_FUNCS([mkstemps mkdtemp])
+dnl androids bionic doesn't have mkstemps
+AS_CASE([$target_os],[*-android*],[AC_CHECK_FUNCS([mkdtemp])],[AC_CHECK_FUNCS([mkstemps mkdtemp])])
 
 # Functions for file synchronization and allocation control
 AC_CHECK_FUNCS([fsync])