kumquat-buildroot/package/python-ujson/0004-Pseiderer-add-nios2-and-xtensa-001.patch

From a54561be5588ac9b16d3c20760b9b554168bb8aa Mon Sep 17 00:00:00 2001
From: Peter Seiderer <pseiderer@users.noreply.github.com>
Date: Thu, 31 Oct 2019 21:26:27 +0100
Subject: [PATCH] Pseiderer/add nios2 and xtensa 001 (#119)

* double-conversion: enable for nios2

Nios2 supports double conversion, tested using qemu:

./main || echo "correct"
correct
uname -a
Linux buildroot 4.19.16 #4 Sat Aug 3 14:46:48 CEST 2019 nios2 GNU/Linux

Solves build error

In file included from double-conversion.h:42:0,
                 from number_decimalquantity.cpp:19:
double-conversion-utils.h:119:2: error: #error Target architecture was not detected as supported by Double-Conversion.
 #error Target architecture was not detected as supported by Double-Conversion.

detected by buildroot autobuilders:
http://autobuild.buildroot.net/results/91e/91eaec34708d91f8a05af189243be0b7cabce31b/

Patch sent upstream: https://github.com/unicode-org/icu/pull/725
Bug report: https://unicode-org.atlassian.net/browse/ICU-20751

[Bernd: Fixed path]
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
[Added Changelog entry]
Signed-off-by: Peter Seiderer <ps.report@gmx.net>

* double-conversion: enable for xtensa

Signed-off-by: Peter Seiderer <ps.report@gmx.net>

[Retrieved (dand backported) from:
https://github.com/google/double-conversion/commit/a54561be5588ac9b16d3c20760b9b554168bb8aa]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
Note:

Double-conversion tested with:

        $ cat div.c
double Div_double(double x, double y) { return x / y; }

        $ cat main.c
double Div_double(double x, double y);

int main(int argc, char** argv) {
  double result = Div_double(89255.0, 1e22);
  if (result == 89255e-22) {
    printf("correct result %e\n", result);
    return 1;
  } else {
    printf("wrong result %e\n", result);
    return 0;
  }
}

Tested for xtensa (using qemu_xtensa_lx60_defconfig plus BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE):

        $ ./host/bin/xtensa-buildroot-linux-uclibc-gcc -c div.c
        $ ./host/bin/xtensa-buildroot-linux-uclibc-gcc -c main.c
        $ ./host/bin/xtensa-buildroot-linux-uclibc-gcc -o main main.o div.o

        $ ./host/bin/qemu-xtensa -L staging main
correct result 8.925500e-18
---
 Changelog                 | 4 ++++
 double-conversion/utils.h | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/deps/double-conversion/double-conversion/utils.h b/deps/double-conversion/double-conversion/utils.h
index 221467f..98ec28b 100644
--- a/deps/double-conversion/double-conversion/utils.h
+++ b/deps/double-conversion/double-conversion/utils.h
@@ -94,6 +94,7 @@ int main(int argc, char** argv) {
     defined(__ARMEL__) || defined(__avr32__) || defined(_M_ARM) || defined(_M_ARM64) || \
     defined(__hppa__) || defined(__ia64__) || \
     defined(__mips__) || \
+    defined(__nios2__) || \
     defined(__powerpc__) || defined(__ppc__) || defined(__ppc64__) || \
     defined(_POWER) || defined(_ARCH_PPC) || defined(_ARCH_PPC64) || \
     defined(__sparc__) || defined(__sparc) || defined(__s390__) || \
@@ -102,7 +103,7 @@ int main(int argc, char** argv) {
     defined(__AARCH64EL__) || defined(__aarch64__) || defined(__AARCH64EB__) || \
     defined(__riscv) || defined(__e2k__) || \
     defined(__or1k__) || defined(__arc__) || \
-    defined(__microblaze__)
+    defined(__microblaze__) || defined(__XTENSA__)
 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
 #elif defined(__mc68000__)
 #undef DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS