Running
./pre-inst-env guix build --target=x86_64-w64-mingw32 hello
on core-updates fails with
--8<---------------cut here---------------start------------->8---
../../../../gcc-7.4.0/libstdc++-v3/libsupc++/new_opa.cc: In function ‘void*
__gnu_cxx::aligned_alloc(std::size_t, std::size_t)’:
../../../../gcc-7.4.0/libstdc++-v3/libsupc++/new_opa.cc:78:10: error:
‘memalign’ was not declared in this scope
return memalign (al, sz);
^~~~~~~~
../../../../gcc-7.4.0/libstdc++-v3/libsupc++/new_opa.cc:78:10: note: suggested
alternative: ‘max_align_t’
return memalign (al, sz);
^~~~~~~~
max_align_t
--8<---------------cut here---------------end--------------->8---
The attached patch fixes this and produces a working cross-built hello.
The weird thing is that I looked at Debian's mingw cross compilers and
its mingw-w64 package and cannot seem to find anything that resembles
this build problem or a fix.
Greetings,
janneke
>From 4966d8dc9e079a5fb776f456dfb3f0918bcfa1b9 Mon Sep 17 00:00:00 2001
From: Jan Nieuwenhuizen <jann...@gnu.org>
Date: Tue, 24 Sep 2019 20:23:31 +0200
Subject: [PATCH] gnu: gcc: Fix mingw cross compiler.
* gnu/packages/patches/gcc-7-cross-mingw.patch: New file.
* gnu/packages/cross-base.scm (cross-gcc): Use it for target mingw and gcc >= 7.
* gnu/local.mk (dist_patch_DATA): Add it.
---
gnu/local.mk | 1 +
gnu/packages/cross-base.scm | 6 ++++-
gnu/packages/patches/gcc-7-cross-mingw.patch | 24 ++++++++++++++++++++
3 files changed, 30 insertions(+), 1 deletion(-)
create mode 100644 gnu/packages/patches/gcc-7-cross-mingw.patch
diff --git a/gnu/local.mk b/gnu/local.mk
index 5705494090..a7b1c65e82 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -851,6 +851,7 @@ dist_patch_DATA = \
%D%/packages/patches/gcc-6-cross-environment-variables.patch \
%D%/packages/patches/gcc-6-source-date-epoch-1.patch \
%D%/packages/patches/gcc-6-source-date-epoch-2.patch \
+ %D%/packages/patches/gcc-7-cross-mingw.patch \
%D%/packages/patches/gcc-8-cross-environment-variables.patch \
%D%/packages/patches/gcc-8-strmov-store-file-names.patch \
%D%/packages/patches/gcc-9-asan-fix-limits-include.patch \
diff --git a/gnu/packages/cross-base.scm b/gnu/packages/cross-base.scm
index 78dae7431a..36f2f5961f 100644
--- a/gnu/packages/cross-base.scm
+++ b/gnu/packages/cross-base.scm
@@ -229,7 +229,11 @@ target that libc."
((version>=? (package-version xgcc) "8.0") (search-patch "gcc-8-cross-environment-variables.patch"))
((version>=? (package-version xgcc) "6.0") (search-patch "gcc-6-cross-environment-variables.patch"))
(else (search-patch "gcc-cross-environment-variables.patch")))
- (cross-gcc-patches target))))
+ (cross-gcc-patches target))
+ (if (and (target-mingw? target)
+ (version>=? (package-version xgcc) "7.0"))
+ (search-patches "gcc-7-cross-mingw.patch")
+ '())))
(modules '((guix build utils)))
(snippet
(cross-gcc-snippet target))))
diff --git a/gnu/packages/patches/gcc-7-cross-mingw.patch b/gnu/packages/patches/gcc-7-cross-mingw.patch
new file mode 100644
index 0000000000..eec6f88953
--- /dev/null
+++ b/gnu/packages/patches/gcc-7-cross-mingw.patch
@@ -0,0 +1,24 @@
+This fixes
+
+../../../../gcc-7.4.0/libstdc++-v3/libsupc++/new_opa.cc: In function ‘void* __gnu_cxx::aligned_alloc(std::size_t, std::size_t)’:
+../../../../gcc-7.4.0/libstdc++-v3/libsupc++/new_opa.cc:78:10: error: ‘memalign’ was not declared in this scope
+ return memalign (al, sz);
+ ^~~~~~~~
+../../../../gcc-7.4.0/libstdc++-v3/libsupc++/new_opa.cc:78:10: note: suggested alternative: ‘max_align_t’
+ return memalign (al, sz);
+ ^~~~~~~~
+ max_align_t
+
+diff --git a/libstdc++-v3/libsupc++/new_opa.cc b/libstdc++-v3/libsupc++/new_opa.cc
+index 94e79cadb0e..084900e0daf 100644
+--- a/libstdc++-v3/libsupc++/new_opa.cc
++++ b/libstdc++-v3/libsupc++/new_opa.cc
+@@ -39,6 +39,8 @@ extern "C" void *memalign(std::size_t boundary, std::size_t size);
+ # endif
+ #endif
+
++#define memalign _aligned_malloc
++
+ using std::new_handler;
+ using std::bad_alloc;
+
--
2.23.0
--
Jan Nieuwenhuizen <jann...@gnu.org> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | Avatar® http://AvatarAcademy.com
