newlib: fix support for x86

Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>

arch/x86_64/src/cmake/platform.cmake

@@ -29,7 +29,7 @@ execute_process(
 
 list(APPEND EXTRA_LIB ${extra_library})
 
-if(NOT CONFIG_LIBM)
+if(CONFIG_LIBM_TOOLCHAIN)
   execute_process(
     COMMAND ${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS} ${NUTTX_EXTRA_FLAGS}
             --print-file-name=libm.a

libs/libm/newlib/0003-newlib-fix-compilation-for-x86.patch

@@ -0,0 +1,39 @@
+From 3035e2e223999497364dbc54b881ebc958be701c Mon Sep 17 00:00:00 2001
+From: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
+Date: Thu, 22 Feb 2024 15:05:36 +0100
+Subject: [PATCH] newlib: fix compilation for x86
+
+Change-Id: I5286ef72e358010ea7b4805e6087b06f67e42d44
+Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
+---
+ newlib/libc/machine/shared_x86/sys/fenv.h | 1 +
+ newlib/libm/machine/shared_x86/fenv.c     | 1 +
+ 2 files changed, 2 insertions(+)
+
+diff --git a/newlib/newlib/newlib/libc/machine/shared_x86/sys/fenv.h newlib/newlib/newlib/libc/machine/shared_x86/sys/fenv.h
+index 243cac27a..be39db4d0 100644
+--- a/newlib/newlib/newlib/libc/machine/shared_x86/sys/fenv.h
++++ newlib/newlib/newlib/libc/machine/shared_x86/sys/fenv.h
+@@ -30,6 +30,7 @@
+ #define _SYS_FENV_H 1
+ 
+ #include <sys/cdefs.h>
++#include <stdint.h>
+ 
+ #ifdef __cplusplus
+ extern "C" {
+diff --git a/newlib/newlib/newlib/libm/machine/shared_x86/fenv.c newlib/newlib/newlib/libm/machine/shared_x86/fenv.c
+index ccc08e2d8..892a8b2cd 100644
+--- a/newlib/newlib/newlib/libm/machine/shared_x86/fenv.c
++++ newlib/newlib/newlib/libm/machine/shared_x86/fenv.c
+@@ -5,6 +5,7 @@
+  */
+ 
+ #define _GNU_SOURCE        // for FE_NOMASK_ENV
++#define __GNU_VISIBLE 1
+ 
+ #include <fenv.h>
+ #include <errno.h>
+-- 
+2.43.1
+

libs/libm/newlib/CMakeLists.txt

@@ -40,7 +40,9 @@ if(CONFIG_LIBM_NEWLIB)
         patch -p1 -d ${CMAKE_CURRENT_LIST_DIR} <
         ${CMAKE_CURRENT_LIST_DIR}/0001-newlib-libm-fix-__RCSID-build-error.patch
         && patch -p1 -d ${CMAKE_CURRENT_LIST_DIR} <
-        ${CMAKE_CURRENT_LIST_DIR}/0002-newlib-libm-remove-include-reent.h.patch)
+        ${CMAKE_CURRENT_LIST_DIR}/0002-newlib-libm-remove-include-reent.h.patch
+        && patch -p1 -d ${CMAKE_CURRENT_LIST_DIR} <
+        ${CMAKE_CURRENT_LIST_DIR}/0003-newlib-fix-compilation-for-x86.patch)
 
     FetchContent_GetProperties(newlib_fetch)
 
@@ -85,6 +87,10 @@ if(CONFIG_LIBM_NEWLIB)
   file(GLOB_RECURSE ARCH_CSRCS
        ${NEWLIB_DIR}/newlib/libm/machine/${ARCH_DIR}/*.c)
 
+  if(CONFIG_ARCH_X86_64)
+    file(GLOB_RECURSE ARCH_CSRCS ${NEWLIB_DIR}/newlib/libm/fenv/*.c)
+  endif()
+
   set(CSRCS ${COMMON_CSRCS} ${COMPLEX_CSRCS} ${ARCH_CSRCS})
 
   if(CONFIG_LIBM_NEWLIB_HW_FP)
@@ -111,6 +117,10 @@ if(CONFIG_LIBM_NEWLIB)
 
   set(INCDIR ${CMAKE_CURRENT_LIST_DIR}/include ${NEWLIB_DIR}/newlib/libm/common)
 
+  if(CONFIG_ARCH_X86_64)
+    list(APPEND INCDIR ${NEWLIB_DIR}/newlib/libc/machine/shared_x86/sys)
+  endif()
+
   # ############################################################################
   # Library Configuration
   # ############################################################################
@@ -121,4 +131,9 @@ if(CONFIG_LIBM_NEWLIB)
   target_include_directories(m PRIVATE ${INCDIR})
   target_compile_options(m PRIVATE ${CFLAGS})
 
+  set_property(
+    TARGET nuttx
+    APPEND
+    PROPERTY NUTTX_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_LIST_DIR}/include)
+
 endif()

libs/libm/newlib/Make.defs

@@ -39,6 +39,7 @@ newlib/newlib: $(NEWLIB_BASENAME)-$(NEWLIB_VERSION).tar.gz
 	$(Q) mv $(NEWLIB_BASENAME)-$(NEWLIB_VERSION) newlib/newlib
 	$(Q) patch -p0 < newlib/0001-newlib-libm-fix-__RCSID-build-error.patch
 	$(Q) patch -p0 < newlib/0002-newlib-libm-remove-include-reent.h.patch
+	$(Q) patch -p0 < newlib/0003-newlib-fix-compilation-for-x86.patch
 	$(Q) touch $@
 endif
 
@@ -81,6 +82,13 @@ endif
 CSRCS += $(wildcard newlib/newlib/newlib/libm/machine/$(ARCH)/*.c)
 VPATH += :newlib/newlib/newlib/libm/machine/$(ARCH)
 
+ifeq ($(CONFIG_ARCH_X86_64),y)
+CSRCS += $(wildcard newlib/newlib/newlib/libm/fenv/*.c)
+VPATH += :newlib/newlib/newlib/libm/fenv
+
+CFLAGS += ${INCDIR_PREFIX}newlib/newlib/newlib/libc/machine/shared_x86/sys
+endif
+
 ifeq ($(CONFIG_LIBM_NEWLIB_HW_FP),y)
   CSRCS += $(wildcard newlib/newlib/newlib/libm/mathfp/*.c)
   VPATH += :newlib/newlib/newlib/libm/mathfp