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Nerves System BR - Buildroot based build platform for Nerves Systems
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patches/buildroot/0015-erlang-make-OTP-version-configurable.patch
From 484499004c98227f98961a0bb4ddcab25632949f Mon Sep 17 00:00:00 2001
From: Frank Hunleth <fhunleth@troodon-software.com>
Date: Mon, 13 Aug 2018 21:49:55 -0400
Subject: [PATCH] erlang: make OTP version configurable
This makes it possible to build either OTP 20 or OTP 21-based Nerves
systems.
---
...truct-libatomic_ops-we-do-require-CA.patch | 71 -------------------
...ulator-reorder-inclued-headers-paths.patch | 47 ------------
...-with-LDLIBS-instead-of-LIBS-for-DED.patch | 42 -----------
...truct-libatomic_ops-we-do-require-CA.patch | 70 ++++++++++++++++++
...ulator-reorder-inclued-headers-paths.patch | 43 +++++++++++
...-with-LDLIBS-instead-of-LIBS-for-DED.patch | 42 +++++++++++
...truct-libatomic_ops-we-do-require-CA.patch | 71 +++++++++++++++++++
...ulator-reorder-inclued-headers-paths.patch | 47 ++++++++++++
...-with-LDLIBS-instead-of-LIBS-for-DED.patch | 42 +++++++++++
package/erlang/Config.in | 18 +++++
package/erlang/erlang.hash | 1 +
package/erlang/erlang.mk | 12 ++++
12 files changed, 346 insertions(+), 160 deletions(-)
delete mode 100644 package/erlang/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch
delete mode 100644 package/erlang/0002-erts-emulator-reorder-inclued-headers-paths.patch
delete mode 100644 package/erlang/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch
create mode 100644 package/erlang/20.3.8.5/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch
create mode 100644 package/erlang/20.3.8.5/0002-erts-emulator-reorder-inclued-headers-paths.patch
create mode 100644 package/erlang/20.3.8.5/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch
create mode 100644 package/erlang/21.0.6/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch
create mode 100644 package/erlang/21.0.6/0002-erts-emulator-reorder-inclued-headers-paths.patch
create mode 100644 package/erlang/21.0.6/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch
diff --git a/package/erlang/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch b/package/erlang/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch
deleted file mode 100644
index ccb1e8432f..0000000000
--- a/package/erlang/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch
+++ /dev/null
@@ -1,71 +0,0 @@
-From f6217a2d195359a1956c20d2600b59d61be8f848 Mon Sep 17 00:00:00 2001
-From: "Yann E. MORIN" <yann.morin.1998@free.fr>
-Date: Sun, 28 Dec 2014 23:39:40 +0100
-Subject: [PATCH] erts/ethread: instruct libatomic_ops we do require CAS
-
-We do require compare-and-swap (CAS), so we must instruct libatomic_ops
-to provide it, even if the architecture does not have instructions for
-it.
-
-For example, on ARM, LDREX is required for fast CAS. But LDREX is only
-available on ARMv6, so by default libatomic_ops will not have CAS for
-anything below, like ARMv5. But ARMv5 is always UP, so using an
-emulated CAS (that is signal-asyn-safe) is still possible (albeit much
-slower).
-
-Tell libatomic_ops to provide CAS, even if the hardware is not capable
-of it, by using emulated CAS, as per libatomic_ops dosc:
- https://github.com/ivmai/libatomic_ops/blob/master/doc/README.txt#L28
-
- If this is included after defining AO_REQUIRE_CAS, then the package
- will make an attempt to emulate compare-and-swap in a way that (at
- least on Linux) should still be async-signal-safe.
-
-Thanks go to Thomas for all this insight! :-)
-Thanks go to Frank for reporting the issue! :-)
-
-Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
-Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-Cc: Frank Hunleth <fhunleth@troodon-software.com>
----
- erts/aclocal.m4 | 4 +++-
- erts/include/internal/libatomic_ops/ethread.h | 1 +
- 2 files changed, 4 insertions(+), 1 deletion(-)
-
-diff --git a/erts/aclocal.m4 b/erts/aclocal.m4
-index 80bf236..56d9dee 100644
---- a/erts/aclocal.m4
-+++ b/erts/aclocal.m4
-@@ -1973,7 +1973,8 @@ case "$THR_LIB_NAME" in
- fi;;
- esac
- ethr_have_libatomic_ops=no
-- AC_TRY_LINK([#include "atomic_ops.h"],
-+ AC_TRY_LINK([#define AO_REQUIRE_CAS
-+ #include "atomic_ops.h"],
- [
- volatile AO_t x;
- AO_t y;
-@@ -2014,6 +2015,7 @@ case "$THR_LIB_NAME" in
- AC_CHECK_SIZEOF(AO_t, ,
- [
- #include <stdio.h>
-+ #define AO_REQUIRE_CAS
- #include "atomic_ops.h"
- ])
- AC_DEFINE_UNQUOTED(ETHR_SIZEOF_AO_T, $ac_cv_sizeof_AO_t, [Define to the size of AO_t if libatomic_ops is used])
-diff --git a/erts/include/internal/libatomic_ops/ethread.h b/erts/include/internal/libatomic_ops/ethread.h
-index 4adc31e..18cc22a 100644
---- a/erts/include/internal/libatomic_ops/ethread.h
-+++ b/erts/include/internal/libatomic_ops/ethread.h
-@@ -36,6 +36,7 @@
-
- #define ETHR_NATIVE_IMPL__ "libatomic_ops"
-
-+#define AO_REQUIRE_CAS
- #include "atomic_ops.h"
- #include "ethr_membar.h"
- #include "ethr_atomic.h"
---
-2.7.4
-
diff --git a/package/erlang/0002-erts-emulator-reorder-inclued-headers-paths.patch b/package/erlang/0002-erts-emulator-reorder-inclued-headers-paths.patch
deleted file mode 100644
index a2cecfbad2..0000000000
--- a/package/erlang/0002-erts-emulator-reorder-inclued-headers-paths.patch
+++ /dev/null
@@ -1,47 +0,0 @@
-From 09b88921b947836834b62da41b18212cb92dc076 Mon Sep 17 00:00:00 2001
-From: Romain Naour <romain.naour@openwide.fr>
-Date: Sun, 8 Feb 2015 17:23:13 +0100
-Subject: [PATCH] erts/emulator: reorder inclued headers paths
-
-If the Perl Compatible Regular Expressions is installed on the
-host and the path to the headers is added to the CFLAGS, the
-pcre.h from the host is used instead of the one provided by
-erlang.
-
-Erlang use an old version of this file which is incompatible
-with the upstream one.
-
-Move INCLUDES before CFLAGS to use pcre.h from erlang.
-
-http://autobuild.buildroot.net/results/cbd/cbd8b54eef535f19d7d400fd269af1b3571d6143/build-end.log
-
-Signed-off-by: Romain Naour <romain.naour@openwide.fr>
----
- erts/emulator/Makefile.in | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in
-index 0546928..38c2f05 100644
---- a/erts/emulator/Makefile.in
-+++ b/erts/emulator/Makefile.in
-@@ -712,7 +712,7 @@ endif
- # Usually the same as the default rule, but certain platforms (e.g. win32) mix
- # different compilers
- $(OBJDIR)/beam_emu.o: beam/beam_emu.c
-- $(V_EMU_CC) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
-+ $(V_EMU_CC) $(INCLUDES) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) -c $< -o $@
-
- $(OBJDIR)/beam_emu.S: beam/beam_emu.c
- $(V_EMU_CC) -S -fverbose-asm $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
-@@ -765,7 +765,7 @@ endif
- # General targets
- #
- $(OBJDIR)/%.o: beam/%.c
-- $(V_CC) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
-+ $(V_CC) $(INCLUDES) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) -c $< -o $@
-
- $(OBJDIR)/%.o: $(TARGET)/%.c
- $(V_CC) $(CFLAGS) $(INCLUDES) -Idrivers/common -c $< -o $@
---
-2.7.4
-
diff --git a/package/erlang/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch b/package/erlang/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch
deleted file mode 100644
index 391b6ebac2..0000000000
--- a/package/erlang/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch
+++ /dev/null
@@ -1,42 +0,0 @@
-From 7baac8804d9441c1bc5db1115eccd290c8b99eda Mon Sep 17 00:00:00 2001
-From: Johan Oudinet <johan.oudinet@gmail.com>
-Date: Wed, 6 Dec 2017 15:01:17 +0100
-Subject: [PATCH] Link with LDLIBS instead of LIBS for DED
-
-Fix ERL-529 by avoiding to link with libz for no reason.
-
-Signed-off-by: Johan Oudinet <johan.oudinet@gmail.com>
----
- lib/asn1/c_src/Makefile | 2 +-
- lib/runtime_tools/c_src/Makefile.in | 2 +-
- 2 files changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/lib/asn1/c_src/Makefile b/lib/asn1/c_src/Makefile
-index 1f714df..f7c6b8b 100644
---- a/lib/asn1/c_src/Makefile
-+++ b/lib/asn1/c_src/Makefile
-@@ -126,7 +126,7 @@ $(NIF_LIB_FILE): $(NIF_STATIC_OBJ_FILES)
- $(V_RANLIB) $@
-
- $(NIF_SHARED_OBJ_FILE): $(NIF_OBJ_FILES)
-- $(V_LD) $(LDFLAGS) -o $(NIF_SHARED_OBJ_FILE) $(NIF_OBJ_FILES) $(CLIB_FLAGS) $(LIBS)
-+ $(V_LD) $(LDFLAGS) -o $(NIF_SHARED_OBJ_FILE) $(NIF_OBJ_FILES) $(CLIB_FLAGS) $(LDLIBS)
-
- # ----------------------------------------------------
- # Release Target
-diff --git a/lib/runtime_tools/c_src/Makefile.in b/lib/runtime_tools/c_src/Makefile.in
-index 4530a83..4e13e0d 100644
---- a/lib/runtime_tools/c_src/Makefile.in
-+++ b/lib/runtime_tools/c_src/Makefile.in
-@@ -95,7 +95,7 @@ $(OBJDIR)/%$(TYPEMARKER).o: %.c dyntrace_lttng.h
- $(V_CC) -c -o $@ $(ALL_CFLAGS) $<
-
- $(LIBDIR)/%$(TYPEMARKER).@DED_EXT@: $(OBJDIR)/%$(TYPEMARKER).o
-- $(V_LD) $(LDFLAGS) -o $@ $^ $(LIBS)
-+ $(V_LD) $(LDFLAGS) -o $@ $^ $(LDLIBS)
-
- clean:
- rm -f $(TRACE_LIBS)
---
-2.7.4
-
diff --git a/package/erlang/20.3.8.5/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch b/package/erlang/20.3.8.5/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch
new file mode 100644
index 0000000000..8e401430fe
--- /dev/null
+++ b/package/erlang/20.3.8.5/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch
@@ -0,0 +1,70 @@
+From 439fa2eae78a8900bda120072335be19d626498c Mon Sep 17 00:00:00 2001
+From: "Yann E. MORIN" <yann.morin.1998@free.fr>
+Date: Sun, 28 Dec 2014 23:39:40 +0100
+Subject: [PATCH] erts/ethread: instruct libatomic_ops we do require CAS
+
+We do require compare-and-swap (CAS), so we must instruct libatomic_ops
+to provide it, even if the architecture does not have instructions for
+it.
+
+For example, on ARM, LDREX is required for fast CAS. But LDREX is only
+available on ARMv6, so by default libatomic_ops will not have CAS for
+anything below, like ARMv5. But ARMv5 is always UP, so using an
+emulated CAS (that is signal-asyn-safe) is still possible (albeit much
+slower).
+
+Tell libatomic_ops to provide CAS, even if the hardware is not capable
+of it, by using emulated CAS, as per libatomic_ops dosc:
+ https://github.com/ivmai/libatomic_ops/blob/master/doc/README.txt#L28
+
+ If this is included after defining AO_REQUIRE_CAS, then the package
+ will make an attempt to emulate compare-and-swap in a way that (at
+ least on Linux) should still be async-signal-safe.
+
+Thanks go to Thomas for all this insight! :-)
+Thanks go to Frank for reporting the issue! :-)
+
+Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
+Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Cc: Frank Hunleth <fhunleth@troodon-software.com>
+---
+ erts/include/internal/libatomic_ops/ethread.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/erts/include/internal/libatomic_ops/ethread.h b/erts/include/internal/libatomic_ops/ethread.h
+index d65ee19..71d3598 100644
+--- a/erts/include/internal/libatomic_ops/ethread.h
++++ b/erts/include/internal/libatomic_ops/ethread.h
+@@ -35,6 +35,7 @@
+
+ #define ETHR_NATIVE_IMPL__ "libatomic_ops"
+
++#define AO_REQUIRE_CAS
+ #include "atomic_ops.h"
+ #include "ethr_membar.h"
+ #include "ethr_atomic.h"
+diff --git a/erts/aclocal.m4 b/erts/aclocal.m4
+index d65ee19..71d3598 100644
+--- a/erts/aclocal.m4
++++ b/erts/aclocal.m4
+@@ -1414,7 +1414,8 @@
+ fi;;
+ esac
+ ethr_have_libatomic_ops=no
+- AC_TRY_LINK([#include "atomic_ops.h"],
++ AC_TRY_LINK([#define AO_REQUIRE_CAS
++ #include "atomic_ops.h"],
+ [
+ volatile AO_t x;
+ AO_t y;
+@@ -1455,6 +1455,7 @@
+ AC_CHECK_SIZEOF(AO_t, ,
+ [
+ #include <stdio.h>
++ #define AO_REQUIRE_CAS
+ #include "atomic_ops.h"
+ ])
+ AC_DEFINE_UNQUOTED(ETHR_SIZEOF_AO_T, $ac_cv_sizeof_AO_t, [Define to the size of AO_t if libatomic_ops is used])
+--
+1.9.1
+
diff --git a/package/erlang/20.3.8.5/0002-erts-emulator-reorder-inclued-headers-paths.patch b/package/erlang/20.3.8.5/0002-erts-emulator-reorder-inclued-headers-paths.patch
new file mode 100644
index 0000000000..c17eefc2a1
--- /dev/null
+++ b/package/erlang/20.3.8.5/0002-erts-emulator-reorder-inclued-headers-paths.patch
@@ -0,0 +1,43 @@
+From 85a3e5b4f65e5284e59dcdd90e92ea7d50ef6907 Mon Sep 17 00:00:00 2001
+From: Romain Naour <romain.naour@openwide.fr>
+Date: Sun, 8 Feb 2015 17:23:13 +0100
+Subject: [PATCH] erts/emulator: reorder inclued headers paths
+
+If the Perl Compatible Regular Expressions is installed on the
+host and the path to the headers is added to the CFLAGS, the
+pcre.h from the host is used instead of the one provided by
+erlang.
+
+Erlang use an old version of this file which is incompatible
+with the upstream one.
+
+Move INCLUDES before CFLAGS to use pcre.h from erlang.
+
+http://autobuild.buildroot.net/results/cbd/cbd8b54eef535f19d7d400fd269af1b3571d6143/build-end.log
+
+Signed-off-by: Romain Naour <romain.naour@openwide.fr>
+---
+ erts/emulator/Makefile.in | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in
+index 7145824..d079487 100644
+--- a/erts/emulator/Makefile.in
++++ b/erts/emulator/Makefile.in
+@@ -678,11 +678,11 @@ else
+ # Usually the same as the default rule, but certain platforms (e.g. win32) mix
+ # different compilers
+ $(OBJDIR)/beam_emu.o: beam/beam_emu.c
+- $(V_EMU_CC) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
++ $(V_EMU_CC) $(INCLUDES) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) -c $< -o $@
+ endif
+
+ $(OBJDIR)/%.o: beam/%.c
+- $(V_CC) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
++ $(V_CC) $(INCLUDES) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) -c $< -o $@
+
+ $(OBJDIR)/%.o: $(TARGET)/%.c
+ $(V_CC) $(CFLAGS) $(INCLUDES) -Idrivers/common -c $< -o $@
+--
+1.9.3
+
diff --git a/package/erlang/20.3.8.5/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch b/package/erlang/20.3.8.5/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch
new file mode 100644
index 0000000000..ad0bb6b453
--- /dev/null
+++ b/package/erlang/20.3.8.5/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch
@@ -0,0 +1,42 @@
+From 011752ec7b31e3dde376270fc65c7ee70644f6e7 Mon Sep 17 00:00:00 2001
+From: Johan Oudinet <johan.oudinet@gmail.com>
+Date: Wed, 6 Dec 2017 15:01:17 +0100
+Subject: [PATCH] Link with LDLIBS instead of LIBS for DED
+
+Fix ERL-529 by avoiding to link with libz for no reason.
+
+Signed-off-by: Johan Oudinet <johan.oudinet@gmail.com>
+---
+ lib/asn1/c_src/Makefile | 2 +-
+ lib/runtime_tools/c_src/Makefile.in | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/lib/asn1/c_src/Makefile b/lib/asn1/c_src/Makefile
+index 1f714df357..f7c6b8b9bc 100644
+--- a/lib/asn1/c_src/Makefile
++++ b/lib/asn1/c_src/Makefile
+@@ -126,7 +126,7 @@ $(NIF_LIB_FILE): $(NIF_STATIC_OBJ_FILES)
+ $(V_RANLIB) $@
+
+ $(NIF_SHARED_OBJ_FILE): $(NIF_OBJ_FILES)
+- $(V_LD) $(LDFLAGS) -o $(NIF_SHARED_OBJ_FILE) $(NIF_OBJ_FILES) $(CLIB_FLAGS) $(LIBS)
++ $(V_LD) $(LDFLAGS) -o $(NIF_SHARED_OBJ_FILE) $(NIF_OBJ_FILES) $(CLIB_FLAGS) $(LDLIBS)
+
+ # ----------------------------------------------------
+ # Release Target
+diff --git a/lib/runtime_tools/c_src/Makefile.in b/lib/runtime_tools/c_src/Makefile.in
+index 4530a83aee..4e13e0d789 100644
+--- a/lib/runtime_tools/c_src/Makefile.in
++++ b/lib/runtime_tools/c_src/Makefile.in
+@@ -95,7 +95,7 @@ $(OBJDIR)/%$(TYPEMARKER).o: %.c dyntrace_lttng.h
+ $(V_CC) -c -o $@ $(ALL_CFLAGS) $<
+
+ $(LIBDIR)/%$(TYPEMARKER).@DED_EXT@: $(OBJDIR)/%$(TYPEMARKER).o
+- $(V_LD) $(LDFLAGS) -o $@ $^ $(LIBS)
++ $(V_LD) $(LDFLAGS) -o $@ $^ $(LDLIBS)
+
+ clean:
+ rm -f $(TRACE_LIBS)
+--
+2.14.1
+
diff --git a/package/erlang/21.0.6/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch b/package/erlang/21.0.6/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch
new file mode 100644
index 0000000000..ccb1e8432f
--- /dev/null
+++ b/package/erlang/21.0.6/0001-erts-ethread-instruct-libatomic_ops-we-do-require-CA.patch
@@ -0,0 +1,71 @@
+From f6217a2d195359a1956c20d2600b59d61be8f848 Mon Sep 17 00:00:00 2001
+From: "Yann E. MORIN" <yann.morin.1998@free.fr>
+Date: Sun, 28 Dec 2014 23:39:40 +0100
+Subject: [PATCH] erts/ethread: instruct libatomic_ops we do require CAS
+
+We do require compare-and-swap (CAS), so we must instruct libatomic_ops
+to provide it, even if the architecture does not have instructions for
+it.
+
+For example, on ARM, LDREX is required for fast CAS. But LDREX is only
+available on ARMv6, so by default libatomic_ops will not have CAS for
+anything below, like ARMv5. But ARMv5 is always UP, so using an
+emulated CAS (that is signal-asyn-safe) is still possible (albeit much
+slower).
+
+Tell libatomic_ops to provide CAS, even if the hardware is not capable
+of it, by using emulated CAS, as per libatomic_ops dosc:
+ https://github.com/ivmai/libatomic_ops/blob/master/doc/README.txt#L28
+
+ If this is included after defining AO_REQUIRE_CAS, then the package
+ will make an attempt to emulate compare-and-swap in a way that (at
+ least on Linux) should still be async-signal-safe.
+
+Thanks go to Thomas for all this insight! :-)
+Thanks go to Frank for reporting the issue! :-)
+
+Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
+Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Cc: Frank Hunleth <fhunleth@troodon-software.com>
+---
+ erts/aclocal.m4 | 4 +++-
+ erts/include/internal/libatomic_ops/ethread.h | 1 +
+ 2 files changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/erts/aclocal.m4 b/erts/aclocal.m4
+index 80bf236..56d9dee 100644
+--- a/erts/aclocal.m4
++++ b/erts/aclocal.m4
+@@ -1973,7 +1973,8 @@ case "$THR_LIB_NAME" in
+ fi;;
+ esac
+ ethr_have_libatomic_ops=no
+- AC_TRY_LINK([#include "atomic_ops.h"],
++ AC_TRY_LINK([#define AO_REQUIRE_CAS
++ #include "atomic_ops.h"],
+ [
+ volatile AO_t x;
+ AO_t y;
+@@ -2014,6 +2015,7 @@ case "$THR_LIB_NAME" in
+ AC_CHECK_SIZEOF(AO_t, ,
+ [
+ #include <stdio.h>
++ #define AO_REQUIRE_CAS
+ #include "atomic_ops.h"
+ ])
+ AC_DEFINE_UNQUOTED(ETHR_SIZEOF_AO_T, $ac_cv_sizeof_AO_t, [Define to the size of AO_t if libatomic_ops is used])
+diff --git a/erts/include/internal/libatomic_ops/ethread.h b/erts/include/internal/libatomic_ops/ethread.h
+index 4adc31e..18cc22a 100644
+--- a/erts/include/internal/libatomic_ops/ethread.h
++++ b/erts/include/internal/libatomic_ops/ethread.h
+@@ -36,6 +36,7 @@
+
+ #define ETHR_NATIVE_IMPL__ "libatomic_ops"
+
++#define AO_REQUIRE_CAS
+ #include "atomic_ops.h"
+ #include "ethr_membar.h"
+ #include "ethr_atomic.h"
+--
+2.7.4
+
diff --git a/package/erlang/21.0.6/0002-erts-emulator-reorder-inclued-headers-paths.patch b/package/erlang/21.0.6/0002-erts-emulator-reorder-inclued-headers-paths.patch
new file mode 100644
index 0000000000..a2cecfbad2
--- /dev/null
+++ b/package/erlang/21.0.6/0002-erts-emulator-reorder-inclued-headers-paths.patch
@@ -0,0 +1,47 @@
+From 09b88921b947836834b62da41b18212cb92dc076 Mon Sep 17 00:00:00 2001
+From: Romain Naour <romain.naour@openwide.fr>
+Date: Sun, 8 Feb 2015 17:23:13 +0100
+Subject: [PATCH] erts/emulator: reorder inclued headers paths
+
+If the Perl Compatible Regular Expressions is installed on the
+host and the path to the headers is added to the CFLAGS, the
+pcre.h from the host is used instead of the one provided by
+erlang.
+
+Erlang use an old version of this file which is incompatible
+with the upstream one.
+
+Move INCLUDES before CFLAGS to use pcre.h from erlang.
+
+http://autobuild.buildroot.net/results/cbd/cbd8b54eef535f19d7d400fd269af1b3571d6143/build-end.log
+
+Signed-off-by: Romain Naour <romain.naour@openwide.fr>
+---
+ erts/emulator/Makefile.in | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in
+index 0546928..38c2f05 100644
+--- a/erts/emulator/Makefile.in
++++ b/erts/emulator/Makefile.in
+@@ -712,7 +712,7 @@ endif
+ # Usually the same as the default rule, but certain platforms (e.g. win32) mix
+ # different compilers
+ $(OBJDIR)/beam_emu.o: beam/beam_emu.c
+- $(V_EMU_CC) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
++ $(V_EMU_CC) $(INCLUDES) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) -c $< -o $@
+
+ $(OBJDIR)/beam_emu.S: beam/beam_emu.c
+ $(V_EMU_CC) -S -fverbose-asm $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
+@@ -765,7 +765,7 @@ endif
+ # General targets
+ #
+ $(OBJDIR)/%.o: beam/%.c
+- $(V_CC) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
++ $(V_CC) $(INCLUDES) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) -c $< -o $@
+
+ $(OBJDIR)/%.o: $(TARGET)/%.c
+ $(V_CC) $(CFLAGS) $(INCLUDES) -Idrivers/common -c $< -o $@
+--
+2.7.4
+
diff --git a/package/erlang/21.0.6/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch b/package/erlang/21.0.6/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch
new file mode 100644
index 0000000000..391b6ebac2
--- /dev/null
+++ b/package/erlang/21.0.6/0003-Link-with-LDLIBS-instead-of-LIBS-for-DED.patch
@@ -0,0 +1,42 @@
+From 7baac8804d9441c1bc5db1115eccd290c8b99eda Mon Sep 17 00:00:00 2001
+From: Johan Oudinet <johan.oudinet@gmail.com>
+Date: Wed, 6 Dec 2017 15:01:17 +0100
+Subject: [PATCH] Link with LDLIBS instead of LIBS for DED
+
+Fix ERL-529 by avoiding to link with libz for no reason.
+
+Signed-off-by: Johan Oudinet <johan.oudinet@gmail.com>
+---
+ lib/asn1/c_src/Makefile | 2 +-
+ lib/runtime_tools/c_src/Makefile.in | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/lib/asn1/c_src/Makefile b/lib/asn1/c_src/Makefile
+index 1f714df..f7c6b8b 100644
+--- a/lib/asn1/c_src/Makefile
++++ b/lib/asn1/c_src/Makefile
+@@ -126,7 +126,7 @@ $(NIF_LIB_FILE): $(NIF_STATIC_OBJ_FILES)
+ $(V_RANLIB) $@
+
+ $(NIF_SHARED_OBJ_FILE): $(NIF_OBJ_FILES)
+- $(V_LD) $(LDFLAGS) -o $(NIF_SHARED_OBJ_FILE) $(NIF_OBJ_FILES) $(CLIB_FLAGS) $(LIBS)
++ $(V_LD) $(LDFLAGS) -o $(NIF_SHARED_OBJ_FILE) $(NIF_OBJ_FILES) $(CLIB_FLAGS) $(LDLIBS)
+
+ # ----------------------------------------------------
+ # Release Target
+diff --git a/lib/runtime_tools/c_src/Makefile.in b/lib/runtime_tools/c_src/Makefile.in
+index 4530a83..4e13e0d 100644
+--- a/lib/runtime_tools/c_src/Makefile.in
++++ b/lib/runtime_tools/c_src/Makefile.in
+@@ -95,7 +95,7 @@ $(OBJDIR)/%$(TYPEMARKER).o: %.c dyntrace_lttng.h
+ $(V_CC) -c -o $@ $(ALL_CFLAGS) $<
+
+ $(LIBDIR)/%$(TYPEMARKER).@DED_EXT@: $(OBJDIR)/%$(TYPEMARKER).o
+- $(V_LD) $(LDFLAGS) -o $@ $^ $(LIBS)
++ $(V_LD) $(LDFLAGS) -o $@ $^ $(LDLIBS)
+
+ clean:
+ rm -f $(TRACE_LIBS)
+--
+2.7.4
+
diff --git a/package/erlang/Config.in b/package/erlang/Config.in
index bf745555e8..2551eea65d 100644
--- a/package/erlang/Config.in
+++ b/package/erlang/Config.in
@@ -34,6 +34,24 @@ config BR2_PACKAGE_ERLANG
if BR2_PACKAGE_ERLANG
+choice
+ bool "Erlang/OTP version"
+ default BR2_PACKAGE_ERLANG_21
+ help
+ Select the Erlang/OTP version
+
+config BR2_PACKAGE_ERLANG_20
+ bool "erlang 20"
+ help
+ Use the latest Erlang/OTP 20 release
+
+config BR2_PACKAGE_ERLANG_21
+ bool "erlang 21"
+ help
+ Use the latest Erlang/OTP 21 release
+
+endchoice
+
config BR2_PACKAGE_ERLANG_MEGACO
bool "install megaco application"
help
diff --git a/package/erlang/erlang.hash b/package/erlang/erlang.hash
index 3d66220d9f..03cc2853ce 100644
--- a/package/erlang/erlang.hash
+++ b/package/erlang/erlang.hash
@@ -1,2 +1,3 @@
# sha256 locally computed
sha256 a7da6ad97106b5ba087394658d41174ac1123d1f017bce02fbb9e43b49676f40 OTP-21.0.6.tar.gz
+sha256 a06d68aaf4884752d226410ff66547783c260bf4fc92147d60c4011465c1de24 OTP-20.3.8.5.tar.gz
diff --git a/package/erlang/erlang.mk b/package/erlang/erlang.mk
index 1e5db01235..fa28841782 100644
--- a/package/erlang/erlang.mk
+++ b/package/erlang/erlang.mk
@@ -5,7 +5,12 @@
################################################################################
# See note below when updating Erlang
+ifeq ($(BR2_PACKAGE_ERLANG_20),y)
+ERLANG_VERSION = 20.3.8.5
+else
ERLANG_VERSION = 21.0.6
+endif
+
ERLANG_SITE = https://github.com/erlang/otp/archive
ERLANG_SOURCE = OTP-$(ERLANG_VERSION).tar.gz
ERLANG_DEPENDENCIES = host-erlang host-autoconf
@@ -14,9 +19,16 @@ ERLANG_LICENSE = Apache-2.0
ERLANG_LICENSE_FILES = LICENSE.txt
ERLANG_INSTALL_STAGING = YES
+ifeq ($(BR2_PACKAGE_ERLANG_20),y)
+# Patched erts/aclocal.m4
+ERLANG_AUTORECONF = YES
+
# Whenever updating Erlang, this value should be updated as well, to the
# value of EI_VSN in the file lib/erl_interface/vsn.mk
+ERLANG_EI_VSN = 3.10.2.1
+else
ERLANG_EI_VSN = 3.10.3
+endif
# The configure checks for these functions fail incorrectly
ERLANG_CONF_ENV = ac_cv_func_isnan=yes ac_cv_func_isinf=yes \
--
2.17.1