From: Jonathan Wakely <jwakely@redhat.com>
Date: Thu, 25 Mar 2021 18:24:37 +0000 (+0000)
Subject: libstdc++: Declare malloc for freestanding
X-Git-Tag: basepoints/gcc-12~425
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=15d649f79d6b6dc336f6a32eec242b652a262a82;p=thirdparty%2Fgcc.git

libstdc++: Declare malloc for freestanding

For a target with none of aligned_alloc, memalign etc. we defined our
own aligned_alloc using malloc, so we need a declaration of malloc. As
in libsupc++/new_op.cc we need to declare it ourselves for freestanding
environments.

libstdc++-v3/ChangeLog:

	* libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare malloc.
---

diff --git a/libstdc++-v3/libsupc++/new_opa.cc b/libstdc++-v3/libsupc++/new_opa.cc
index 59296226e83e..6b78729dc240 100644
--- a/libstdc++-v3/libsupc++/new_opa.cc
+++ b/libstdc++-v3/libsupc++/new_opa.cc
@@ -54,6 +54,10 @@ extern "C"
   void *posix_memalign(void **, size_t alignment, size_t size);
 # elif _GLIBCXX_HAVE_MEMALIGN
   void *memalign(size_t alignment, size_t size);
+# else
+  // A freestanding C runtime may not provide "malloc" -- but there is no
+  // other reasonable way to implement "operator new".
+  void *malloc(size_t);
 # endif
 }
 #endif