From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Fri, 20 Oct 2023 22:23:15 +0000 (+0200)
Subject: [3.12] gh-111046: for wasi-threads, export memory as well via the linker (GH-111099... 
X-Git-Tag: v3.12.1~252
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=727f8ee31cadf196ecab51762b2e84a884470618;p=thirdparty%2FPython%2Fcpython.git

[3.12] gh-111046: for wasi-threads, export memory as well via the linker (GH-111099) (GH-111141)

gh-111046: for wasi-threads, export memory as well via the linker (GH-111099)
(cherry picked from commit 5dfa71769f547fffa893a89b0b04d963a41b2441)

Co-authored-by: YAMAMOTO Takashi <yamamoto@midokura.com>
---

diff --git a/Misc/NEWS.d/next/Build/2023-10-20-15-29-31.gh-issue-111046.2DxQl8.rst b/Misc/NEWS.d/next/Build/2023-10-20-15-29-31.gh-issue-111046.2DxQl8.rst
new file mode 100644
index 000000000000..446b8b612862
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2023-10-20-15-29-31.gh-issue-111046.2DxQl8.rst
@@ -0,0 +1 @@
+For wasi-threads, memory is now exported to fix compatibility issues with some wasm runtimes.
diff --git a/configure b/configure
index 0240ff86dccb..7c3250729c89 100755
--- a/configure
+++ b/configure
@@ -9439,10 +9439,15 @@ then :
       # without this, configure fails to find pthread_create, sem_init,
       # etc because they are only available in the sysroot for
       # wasm32-wasi-threads.
+      # Note: wasi-threads requires --import-memory.
+      # Note: wasi requires --export-memory.
+      # Note: --export-memory is implicit unless --import-memory is given
+      # Note: this requires LLVM >= 16.
       as_fn_append CFLAGS " -target wasm32-wasi-threads -pthread"
       as_fn_append CFLAGS_NODIST " -target wasm32-wasi-threads -pthread"
       as_fn_append LDFLAGS_NODIST " -target wasm32-wasi-threads -pthread"
       as_fn_append LDFLAGS_NODIST " -Wl,--import-memory"
+      as_fn_append LDFLAGS_NODIST " -Wl,--export-memory"
       as_fn_append LDFLAGS_NODIST " -Wl,--max-memory=10485760"
 
 fi
diff --git a/configure.ac b/configure.ac
index 34e0653623dd..3afa9aca8bbd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2326,10 +2326,15 @@ AS_CASE([$ac_sys_system],
       # without this, configure fails to find pthread_create, sem_init,
       # etc because they are only available in the sysroot for
       # wasm32-wasi-threads.
+      # Note: wasi-threads requires --import-memory.
+      # Note: wasi requires --export-memory.
+      # Note: --export-memory is implicit unless --import-memory is given
+      # Note: this requires LLVM >= 16.
       AS_VAR_APPEND([CFLAGS], [" -target wasm32-wasi-threads -pthread"])
       AS_VAR_APPEND([CFLAGS_NODIST], [" -target wasm32-wasi-threads -pthread"])
       AS_VAR_APPEND([LDFLAGS_NODIST], [" -target wasm32-wasi-threads -pthread"])
       AS_VAR_APPEND([LDFLAGS_NODIST], [" -Wl,--import-memory"])
+      AS_VAR_APPEND([LDFLAGS_NODIST], [" -Wl,--export-memory"])
       AS_VAR_APPEND([LDFLAGS_NODIST], [" -Wl,--max-memory=10485760"])
     ])