dev-lang/ruby: add patches for musl

Fix two problems:
1. fix compilation problem in coroutine
2. address stack size such that one can e.g. run puppet

Closes: https://bugs.gentoo.org/721068
Package-Manager: Portage-3.0.20, Repoman-3.0.3
Signed-off-by: Fabian Groffen <grobian@gentoo.org>

5 files changed, 104 insertions, 0 deletions

diff --git a/dev-lang/ruby/files/2.7/900-musl-coroutine.patch b/dev-lang/ruby/files/2.7/900-musl-coroutine.patch
new file mode 100644
index 000000000000..ed47c54e29c7
--- /dev/null
+++ b/dev-lang/ruby/files/2.7/900-musl-coroutine.patch
@@ -0,0 +1,41 @@
+Adapted for Gentoo version 2.7.4
+
+From b570e7de87aaad8c903176d835e8124127f627b3 Mon Sep 17 00:00:00 2001
+From: Andrew Aladjev <aladjev.andrew@gmail.com>
+Date: Sat, 26 Sep 2020 12:58:06 +0300
+Subject: [PATCH] fixed default coroutine selection for musl
+
+---
+ configure.ac             | 5 ++++-
+ coroutine/copy/Context.c | 2 ++
+ 2 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index ab5d532c103b..084f0936c006 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -2364,7 +2364,10 @@
+             rb_cv_coroutine=copy
+         ],
+         [*], [
+-            rb_cv_coroutine=ucontext
++            AC_CHECK_FUNCS([getcontext swapcontext makecontext],
++                [rb_cv_coroutine=ucontext],
++                [rb_cv_coroutine=copy; break]
++            )
+         ]
+     )
+     AC_MSG_RESULT(${rb_cv_coroutine})
+diff --git a/coroutine/copy/Context.c b/coroutine/copy/Context.c
+index c1b4144e9857..94a7f57f7d89 100644
+--- a/coroutine/copy/Context.c
++++ b/coroutine/copy/Context.c
+@@ -5,6 +5,8 @@
+  *  Copyright, 2019, by Samuel Williams.
+ */
+ 
++#include <sys/types.h>
++
+ #include "Context.h"
+ 
+ // http://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html
diff --git a/dev-lang/ruby/files/2.7/901-musl-stacksize.patch b/dev-lang/ruby/files/2.7/901-musl-stacksize.patch
new file mode 100644
index 000000000000..e5fcfce2195e
--- /dev/null
+++ b/dev-lang/ruby/files/2.7/901-musl-stacksize.patch
@@ -0,0 +1,26 @@
+musl has a conservative stacksize, as compared to glibc, so treat it
+like other systems with such stacksize
+
+diff --git a/thread_pthread.c b/thread_pthread.c
+index 951885ffa0..e2d662143b 100644
+--- a/thread_pthread.c
++++ b/thread_pthread.c
+@@ -721,7 +721,7 @@ ruby_init_stack(volatile VALUE *addr
+ {
+     native_main_thread.id = pthread_self();
+ 
+-#if MAINSTACKADDR_AVAILABLE
++#if MAINSTACKADDR_AVAILABLE && !(defined(__linux__) && !defined(__GLIBC__))
+     if (native_main_thread.stack_maxsize) return;
+     {
+        void* stackaddr;
+@@ -1680,7 +1680,7 @@ ruby_stack_overflowed_p(const rb_thread_t *th, const void *addr)
+
+ #ifdef STACKADDR_AVAILABLE
+     if (get_stack(&base, &size) == 0) {
+-# ifdef __APPLE__
++# if defined(__APPLE__) || (defined(__linux__) && !defined(__GLIBC__))
+ 	if (pthread_equal(th->thread_id, native_main_thread.id)) {
+ 	    struct rlimit rlim;
+ 	    if (getrlimit(RLIMIT_STACK, &rlim) == 0 && rlim.rlim_cur > size) {
+
diff --git a/dev-lang/ruby/files/3.0/900-musl-coroutine.patch b/dev-lang/ruby/files/3.0/900-musl-coroutine.patch
new file mode 100644
index 000000000000..a323cdd6e770
--- /dev/null
+++ b/dev-lang/ruby/files/3.0/900-musl-coroutine.patch
@@ -0,0 +1,28 @@
+Adapted for Gentoo version 3.0.2
+
+From b570e7de87aaad8c903176d835e8124127f627b3 Mon Sep 17 00:00:00 2001
+From: Andrew Aladjev <aladjev.andrew@gmail.com>
+Date: Sat, 26 Sep 2020 12:58:06 +0300
+Subject: [PATCH] fixed default coroutine selection for musl
+
+---
+ configure.ac             | 5 ++++-
+ coroutine/copy/Context.c | 2 ++
+ 2 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index ab5d532c103b..084f0936c006 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -2364,7 +2364,10 @@
+             rb_cv_coroutine=copy
+         ],
+         [
+-            rb_cv_coroutine=ucontext
++            AC_CHECK_FUNCS([getcontext swapcontext makecontext],
++                [rb_cv_coroutine=ucontext],
++                [rb_cv_coroutine=copy; break]
++            )
+         ]
+     )
+     AC_MSG_RESULT(${rb_cv_coroutine})
diff --git a/dev-lang/ruby/ruby-2.7.4.ebuild b/dev-lang/ruby/ruby-2.7.4.ebuild
index 41cea1ac56ab..91fa086e55cc 100644
--- a/dev-lang/ruby/ruby-2.7.4.ebuild
+++ b/dev-lang/ruby/ruby-2.7.4.ebuild
@@ -65,6 +65,10 @@ PDEPEND="
 src_prepare() {
 	eapply "${FILESDIR}"/2.7/{003,010}*.patch
 
+	if use elibc_musl ; then
+		eapply "${FILESDIR}"/2.7/{900,901}-musl-*.patch
+	fi
+
 	# Reset time on patched gem_prelude.rb to avoid the need for a base
 	# ruby during bootstrapping, bug 787137
 	touch -t 202001010000 gem_prelude.rb || die
diff --git a/dev-lang/ruby/ruby-3.0.2.ebuild b/dev-lang/ruby/ruby-3.0.2.ebuild
index baa8d04f1336..ae8a7216c6d8 100644
--- a/dev-lang/ruby/ruby-3.0.2.ebuild
+++ b/dev-lang/ruby/ruby-3.0.2.ebuild
@@ -67,6 +67,11 @@ PDEPEND="
 src_prepare() {
 	eapply "${FILESDIR}"/"${SLOT}"/010*.patch
 
+	if use elibc_musl ; then
+		eapply "${FILESDIR}"/3.0/900-musl-*.patch
+		eapply "${FILESDIR}"/2.7/901-musl-*.patch
+	fi
+
 	einfo "Unbundling gems..."
 	cd "$S"
 	# Remove bundled gems that we will install via PDEPEND, bug