<alloca.h> on cygwin pulls in a ton of stuff (macros and function protos)

that we REALLY don't want in the CBE code.

With this fix, the CBE passes all of the MultiSource tests on cygwin that
it does on linux.  Yaay!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13975 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index b73a4e40cd852181704cb38df1eae02cd661e1d3..d993919f8b1064d2aea82a70105f921ec4e743c4 100644 (file)
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -660,7 +660,7 @@ void CWriter::writeOperand(Value *Operand) {
 static void generateCompilerSpecificCode(std::ostream& Out) {
   // Alloca is hard to get, and we don't want to include stdlib.h here...
   Out << "/* get a declaration for alloca */\n"
-      << "#ifdef sun\n"
+      << "#if defined(sun) || defined(__CYGWIN__)\n"
       << "extern void *__builtin_alloca(unsigned long);\n"
       << "#define alloca(x) __builtin_alloca(x)\n"
       << "#else\n"

diff --git a/lib/Target/CBackend/Writer.cpp b/lib/Target/CBackend/Writer.cpp
index b73a4e40cd852181704cb38df1eae02cd661e1d3..d993919f8b1064d2aea82a70105f921ec4e743c4 100644 (file)
--- a/lib/Target/CBackend/Writer.cpp
+++ b/lib/Target/CBackend/Writer.cpp
@@ -660,7 +660,7 @@ void CWriter::writeOperand(Value *Operand) {
 static void generateCompilerSpecificCode(std::ostream& Out) {
   // Alloca is hard to get, and we don't want to include stdlib.h here...
   Out << "/* get a declaration for alloca */\n"
-      << "#ifdef sun\n"
+      << "#if defined(sun) || defined(__CYGWIN__)\n"
       << "extern void *__builtin_alloca(unsigned long);\n"
       << "#define alloca(x) __builtin_alloca(x)\n"
       << "#else\n"