[PATCH 3/6] [DJGPP] libbacktrace/configure.ac: specify that DJGPP do not have mmap()

[PATCH 3/6] [DJGPP] libbacktrace/configure.ac: specify that DJGPP do not have mmap()

[Andris Pavenis]

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Patch specifies that DJGPP do not have mmap() even when sys/mman.h is available.
libbacktrace is perhaps currently unusable for DJGPP but otherwise mmap() usability
misdetection breaks cross-compiler build for DJGPP target (for example Linux hosted
cross-compiler)

Andris

2015-12-05 Andris Pavenis <andris.pavenis@iki.fi>

* configure.ac: Specify that DJGPP do not have mmap even when sys/mman.h exists
* configure: Regenerate

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From 5fb05d0ae112ae1c938c2edf94b8dff8cd5dd1d6 Mon Sep 17 00:00:00 2001
From: Andris Pavenis <andris.pavenis@iki.fi>
Date: Tue, 24 Nov 2015 20:22:52 +0200
Subject: [PATCH 3/6] [DJGPP] libbacktrace/configure.ac: specify that DJGPP do not have mmap()

---
 libbacktrace/configure    | 3 ++-
 libbacktrace/configure.ac | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/libbacktrace/configure b/libbacktrace/configure
index f8adc83..015c944 100755
--- a/libbacktrace/configure
+++ b/libbacktrace/configure
@@ -12301,9 +12301,10 @@ else
     # simply assume that if we have mman.h, we have mmap.
     have_mmap=yes
     case "${host}" in
-    spu-*-*)
+    spu-*-*|*-*-msdosdjgpp)
         # The SPU does not have mmap, but it has a sys/mman.h header file
         # containing "mmap_eaddr" and the mmap flags, confusing the test.
+        # DJGPP also has sys/man.h, but no mmap
 	have_mmap=no ;;
     esac
   else
diff --git a/libbacktrace/configure.ac b/libbacktrace/configure.ac
index 33866e9..7a0a157 100644
--- a/libbacktrace/configure.ac
+++ b/libbacktrace/configure.ac
@@ -267,9 +267,10 @@ else
     # simply assume that if we have mman.h, we have mmap.
     have_mmap=yes
     case "${host}" in
-    spu-*-*)
+    spu-*-*|*-*-msdosdjgpp)
         # The SPU does not have mmap, but it has a sys/mman.h header file
         # containing "mmap_eaddr" and the mmap flags, confusing the test.
+        # DJGPP also has sys/man.h, but no mmap
 	have_mmap=no ;;
     esac
   else
-- 
2.4.3

Re: [PATCH 3/6] [DJGPP] libbacktrace/configure.ac: specify that DJGPP do not have mmap()

[Jeff Law]

On 12/05/2015 10:14 AM, Andris Pavenis wrote:
> Patch specifies that DJGPP do not have mmap() even when sys/mman.h is
> available.
> libbacktrace is perhaps currently unusable for DJGPP but otherwise
> mmap() usability
> misdetection breaks cross-compiler build for DJGPP target (for example
> Linux hosted
> cross-compiler)
>
> Andris
>
> 2015-12-05 Andris Pavenis <andris.pavenis@iki.fi>
>
> * configure.ac: Specify that DJGPP do not have mmap even when sys/mman.h
> exists
> * configure: Regenerate
OK.
jeff