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[binutils-gdb/gdb-8.3-branch] Fix MinGW build with source-highlight


https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=4a9e44628b32c26e91aa480ae93db4432ed8d957

commit 4a9e44628b32c26e91aa480ae93db4432ed8d957
Author: Eli Zaretskii <eliz@gnu.org>
Date:   Tue Mar 12 19:47:23 2019 +0200

    Fix MinGW build with source-highlight
    
    gdb/ChangeLog
    2019-03-12  Eli Zaretskii  <eliz@gnu.org>
    
    	PR/24325
    	* source-cache.c: #undef open and close, to avoid unresolved
    	externals during linking.
    
    (cherry picked from commit 3a3508220eecf27e1952a73cd3ea6d6314ce8e1d)

Diff:
---
 gdb/ChangeLog      | 6 ++++++
 gdb/source-cache.c | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b6c78f0..a7cb89d 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2019-03-12  Eli Zaretskii  <eliz@gnu.org>
+
+	PR/24325
+	* source-cache.c: #undef open and close, to avoid unresolved
+	externals during linking.
+
 2019-03-08  Eli Zaretskii  <eliz@gnu.org>
 
 	Support styling on native MS-Windows console
diff --git a/gdb/source-cache.c b/gdb/source-cache.c
index 097c8a3..435de2a 100644
--- a/gdb/source-cache.c
+++ b/gdb/source-cache.c
@@ -23,6 +23,12 @@
 #include "cli/cli-style.h"
 
 #ifdef HAVE_SOURCE_HIGHLIGHT
+/* If Gnulib redirects 'open' and 'close' to its replacements
+   'rpl_open' and 'rpl_close' via cpp macros, including <fstream>
+   below with those macros in effect will cause unresolved externals
+   when GDB is linked.  Happens, e.g., in the MinGW build.  */
+#undef open
+#undef close
 #include <fstream>
 #include <sstream>
 #include <srchilite/sourcehighlight.h>


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