Commented out some stuff and removed uneeded lines.

build/linker_script.ld

@@ -0,0 +1,122 @@
+ENTRY( InterruptVector )
+MEMORY
+{
+ FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 16K
+ RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 2K
+}
+SECTIONS
+{
+    .init :
+    {
+      _sinit = .;
+      . = ALIGN(4);
+      KEEP(*(SORT_NONE(.init)))
+      . = ALIGN(4);
+      _einit = .;
+    } >FLASH AT>FLASH
+    .text :
+    {
+      . = ALIGN(4);
+      *(.text)
+      *(.text.*)
+      *(.rodata)
+      *(.rodata*)
+      *(.gnu.linkonce.t.*)
+      . = ALIGN(4);
+    } >FLASH AT>FLASH
+    .fini :
+    {
+      KEEP(*(SORT_NONE(.fini)))
+      . = ALIGN(4);
+    } >FLASH AT>FLASH
+    PROVIDE( _etext = . );
+    PROVIDE( _eitcm = . );
+    .preinit_array :
+    {
+      PROVIDE_HIDDEN (__preinit_array_start = .);
+      KEEP (*(.preinit_array))
+      PROVIDE_HIDDEN (__preinit_array_end = .);
+    } >FLASH AT>FLASH
+    .init_array :
+    {
+      PROVIDE_HIDDEN (__init_array_start = .);
+      KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
+      KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
+      PROVIDE_HIDDEN (__init_array_end = .);
+    } >FLASH AT>FLASH
+    .fini_array :
+    {
+      PROVIDE_HIDDEN (__fini_array_start = .);
+      KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
+      KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
+      PROVIDE_HIDDEN (__fini_array_end = .);
+    } >FLASH AT>FLASH
+    .ctors :
+    {
+      KEEP (*crtbegin.o(.ctors))
+      KEEP (*crtbegin?.o(.ctors))
+      KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
+      KEEP (*(SORT(.ctors.*)))
+      KEEP (*(.ctors))
+    } >FLASH AT>FLASH
+    .dtors :
+    {
+      KEEP (*crtbegin.o(.dtors))
+      KEEP (*crtbegin?.o(.dtors))
+      KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
+      KEEP (*(SORT(.dtors.*)))
+      KEEP (*(.dtors))
+    } >FLASH AT>FLASH
+    .dalign :
+    {
+      . = ALIGN(4);
+      PROVIDE(_data_vma = .);
+    } >RAM AT>FLASH
+    .dlalign :
+    {
+      . = ALIGN(4);
+      PROVIDE(_data_lma = .);
+    } >FLASH AT>FLASH
+    .data :
+    {
+      . = ALIGN(4);
+      __global_pointer$ = . + 0x3fc;
+      *(.gnu.linkonce.r.*)
+      *(.data .data.*)
+      *(.gnu.linkonce.d.*)
+      . = ALIGN(8);
+      *(.sdata .sdata.*)
+      *(.sdata2*)
+      *(.gnu.linkonce.s.*)
+      . = ALIGN(8);
+      *(.srodata.cst16)
+      *(.srodata.cst8)
+      *(.srodata.cst4)
+      *(.srodata.cst2)
+      *(.srodata .srodata.*)
+      . = ALIGN(4);
+      PROVIDE( _edata = .);
+    } >RAM AT>FLASH
+    .bss :
+    {
+      . = ALIGN(4);
+      PROVIDE( _sbss = .);
+      *(.sbss*)
+      *(.gnu.linkonce.sb.*)
+      *(.bss*)
+      *(.gnu.linkonce.b.*)
+      *(COMMON*)
+      . = ALIGN(4);
+      PROVIDE( _ebss = .);
+    } >RAM AT>FLASH
+    PROVIDE( _end = _ebss);
+ PROVIDE( end = . );
+ PROVIDE( _eusrstack = ORIGIN(RAM) + LENGTH(RAM));
+    /DISCARD/ : {
+      *(.note .note.*)
+      *(.eh_frame .eh_frame.*)
+      *(.comment .comment.*)
+      *(.ARM.extab* .gnu.linkonce.armextab.*)
+      *(.ARM.exidx*)
+    }
+}

riscv32-toolchain.cmake

@@ -33,8 +33,7 @@ if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "FreeBSD")
     set(CMAKE_C_COMPILER riscv32-unknown-elf-gcc)
     set(CMAKE_CXX_COMPILER riscv32-unknown-elf-g++)
     set(CMAKE_FIND_ROOT_PATH /usr/local/riscv/)
-    #set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --sysroot=${NEWLIB}")
+
-    #set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --sysroot=${NEWLIB}")
     # Without these two lines it freaks out.
     set(CMAKE_C_STANDARD_COMPUTED_DEFAULT GNU)
     set(CMAKE_CXX_STANDARD_COMPUTED_DEFAULT GNU)
@@ -44,6 +43,8 @@ elseif(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
     set(NEWLIB /opt/riscv/riscv32-unknown-elf/include)
     set(CMAKE_C_COMPILER riscv32-unknown-elf-gcc)
     set(CMAKE_CXX_COMPILER riscv32-unknown-elf-g++)
+    
+    # Without these two lines it freaks out.
     set(CMAKE_C_STANDARD_COMPUTED_DEFAULT GNU)
     set(CMAKE_CXX_STANDARD_COMPUTED_DEFAULT GNU)
 else()
@@ -67,14 +68,10 @@ endif()
 # `/inc/funconfig.h` file.
 
 # Specify the exact Chip
-#set(MCU CH32V003J4M6)
-#set(MCU CH32V003A4M6)
-#set(MCU CH32V003F4P6)
-#set(MCU CH32V003F4U6)
 set(MCU CH32V003)
 
 #Define it for the preprocessor as well.
-add_compile_definitions(${MCU})
+add_compile_definitions(${MCU}=1)
 
 #add_definitions(-D${MCU})
 
@@ -113,9 +110,7 @@ set(C_FLAGS_ARCH "\
 #-------------------
 
 # I'm appending to the existing cflags from the cmake file in the root dir.
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} \
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${C_FLAGS_ARCH} ${OBJECT_GEN_FLAGS}")
-${C_FLAGS_ARCH} \
-${OBJECT_GEN_FLAGS}")
 
 
 #-------------------
@@ -128,7 +123,8 @@ ${OBJECT_GEN_FLAGS}")
 #-------------------
 
 #set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_SCRIPT})
-set(LINKER_SCRIPT "./src/ch32v003.ld")
+#set(LINKER_SCRIPT "./src/ch32v003.ld")
+set(LINKER_SCRIPT "${CMAKE_SOURCE_DIR}/src/linker_script.ld")
 
 #set(LD_FLAGS "-lgcc")
 set(LD_FLAGS " \
@@ -136,8 +132,21 @@ set(LD_FLAGS " \
     -Wl,-Map=${PROJECT_NAME}.map \
     -lgcc \
     -T ${LINKER_SCRIPT} \
-    -Wl,--gc-sections")
+    -Wl,--gc-sections"
+)
 
+#Allowing this line causes it to attempt compiler tests and if 
+# tosses errors.
+
+#set(CMAKE_EXE_LINKER_FLAGS_INIT "${LD_FLAGS}")
+
+
+#target_link_options(my_project PRIVATE -static -nostartfiles -T linker_script.ld)
+#set(CMAKE_EXE_LINKER_FLAGS_INIT "${LD_FLAGS}")
+#set(LINKER_SCRIPT "${CMAKE_SOURCE_DIR}/src/linker_script.ld")
+
+#set(LINKER_SCRIPT "${CMAKE_SOURCE_DIR}/linker_script.ld")
+#set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -T ${LINKER_SCRIPT}")
 
 
 #-------------------
@@ -149,8 +158,7 @@ message(STATUS "CMAKE_INCLUDE_PATH: ${CMAKE_INCLUDE_PATH}")
 message(STATUS "CMAKE_FIND_ROOT_PATH: ${CMAKE_FIND_ROOT_PATH}")
 
 
-
 # Unset all cache
-unset(SEMIHOSTING)
+#unset(SEMIHOSTING)
-unset(CMAKE_TOOLCHAIN_FILE)
+#unset(CMAKE_TOOLCHAIN_FILE)
-unset(CMAKE_BUILD_TYPE)
+#unset(CMAKE_BUILD_TYPE)

src/CMakeLists.txt

@@ -1,19 +1,3 @@
-# Compiler flags
-add_compile_options(
-    -g
-    -Os
-    -flto
-    -ffunction-sections
-    -fdata-sections
-    -fmessage-length=0
-    -msmall-data-limit=8
-    -march=rv32ec
-    -mabi=ilp32e
-    -DCH32V003=1
-    -static-libgcc
-    -nostdlib
-    -Wall
-)
 
 add_executable(${PROJECT_NAME}
     main.c    
@@ -30,11 +14,35 @@ target_link_libraries(${PROJECT_NAME}
     #${CMAKE_SOURCE_DIR}/libgcc.a
 )
 
-target_link_options(${PROJECT_NAME} PRIVATE -static-libgcc)
+target_link_options(${PROJECT_NAME} PRIVATE
+    -Wl,--print-memory-usage
+    -Wl,-Map=${PROJECT_NAME}.map
+    -lgcc
+    -Wl,--gc-sections
+    -T ${CMAKE_SOURCE_DIR}/src/linker_script.ld
+    )
+
+target_compile_options(${PROJECT_NAME} PRIVATE
+    -g
+    -Os
+    -flto
+    -ffunction-sections
+    -fdata-sections
+    -fmessage-length=0
+    -msmall-data-limit=8
+    -march=rv32ec
+    -mabi=ilp32e
+    -DCH32V003=1
+    -static-libgcc
+    -nostdlib
+    -Wall
+)
 
 
 set_target_properties(${PROJECT_NAME} PROPERTIES SUFFIX ".elf")
 
+#target_link_options(${PROJECT_NAME} PRIVATE -static -nostartfiles -T "./linker_script.ld")
+
 # The other "targets" are size, upload, debug, production, etc
 
 #if(NOT TARGET size)

src/ch32fun/CMakeLists.txt

@@ -1,5 +1,16 @@
-# Compiler flags
+
-add_compile_options(
+add_library(ch32fun OBJECT 
+    ch32fun.c
+)
+
+target_include_directories(ch32fun PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}
+    ${CMAKE_SOURCE_DIR}/inc
+    ${CMAKE_SOURCE_DIR}/src/extralibs
+    ${CMAKE_SOURCE_DIR}/src/ch32fun
+)
+
+target_compile_options(ch32fun PRIVATE
     -g
     -Os
     -flto
@@ -15,17 +26,7 @@ add_compile_options(
     -Wall
 )
 
-add_library(ch32fun OBJECT 
-    ch32fun.c
-)
-
-target_include_directories(ch32fun PUBLIC
-    ${CMAKE_CURRENT_LIST_DIR}
-    ${CMAKE_SOURCE_DIR}/inc
-    ${CMAKE_SOURCE_DIR}/src/extralibs
-    ${CMAKE_SOURCE_DIR}/src/ch32fun
-)
-
 #target_link_libraries(ch32fun PRIVATE
 #    ${CMAKE_SOURCE_DIR}/libgcc.a
 #)
+

src/linker_script.ld

@@ -0,0 +1,122 @@
+ENTRY( InterruptVector )
+MEMORY
+{
+ FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 16K
+ RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 2K
+}
+SECTIONS
+{
+    .init :
+    {
+      _sinit = .;
+      . = ALIGN(4);
+      KEEP(*(SORT_NONE(.init)))
+      . = ALIGN(4);
+      _einit = .;
+    } >FLASH AT>FLASH
+    .text :
+    {
+      . = ALIGN(4);
+      *(.text)
+      *(.text.*)
+      *(.rodata)
+      *(.rodata*)
+      *(.gnu.linkonce.t.*)
+      . = ALIGN(4);
+    } >FLASH AT>FLASH
+    .fini :
+    {
+      KEEP(*(SORT_NONE(.fini)))
+      . = ALIGN(4);
+    } >FLASH AT>FLASH
+    PROVIDE( _etext = . );
+    PROVIDE( _eitcm = . );
+    .preinit_array :
+    {
+      PROVIDE_HIDDEN (__preinit_array_start = .);
+      KEEP (*(.preinit_array))
+      PROVIDE_HIDDEN (__preinit_array_end = .);
+    } >FLASH AT>FLASH
+    .init_array :
+    {
+      PROVIDE_HIDDEN (__init_array_start = .);
+      KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
+      KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
+      PROVIDE_HIDDEN (__init_array_end = .);
+    } >FLASH AT>FLASH
+    .fini_array :
+    {
+      PROVIDE_HIDDEN (__fini_array_start = .);
+      KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
+      KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
+      PROVIDE_HIDDEN (__fini_array_end = .);
+    } >FLASH AT>FLASH
+    .ctors :
+    {
+      KEEP (*crtbegin.o(.ctors))
+      KEEP (*crtbegin?.o(.ctors))
+      KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
+      KEEP (*(SORT(.ctors.*)))
+      KEEP (*(.ctors))
+    } >FLASH AT>FLASH
+    .dtors :
+    {
+      KEEP (*crtbegin.o(.dtors))
+      KEEP (*crtbegin?.o(.dtors))
+      KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
+      KEEP (*(SORT(.dtors.*)))
+      KEEP (*(.dtors))
+    } >FLASH AT>FLASH
+    .dalign :
+    {
+      . = ALIGN(4);
+      PROVIDE(_data_vma = .);
+    } >RAM AT>FLASH
+    .dlalign :
+    {
+      . = ALIGN(4);
+      PROVIDE(_data_lma = .);
+    } >FLASH AT>FLASH
+    .data :
+    {
+      . = ALIGN(4);
+      __global_pointer$ = . + 0x3fc;
+      *(.gnu.linkonce.r.*)
+      *(.data .data.*)
+      *(.gnu.linkonce.d.*)
+      . = ALIGN(8);
+      *(.sdata .sdata.*)
+      *(.sdata2*)
+      *(.gnu.linkonce.s.*)
+      . = ALIGN(8);
+      *(.srodata.cst16)
+      *(.srodata.cst8)
+      *(.srodata.cst4)
+      *(.srodata.cst2)
+      *(.srodata .srodata.*)
+      . = ALIGN(4);
+      PROVIDE( _edata = .);
+    } >RAM AT>FLASH
+    .bss :
+    {
+      . = ALIGN(4);
+      PROVIDE( _sbss = .);
+      *(.sbss*)
+      *(.gnu.linkonce.sb.*)
+      *(.bss*)
+      *(.gnu.linkonce.b.*)
+      *(COMMON*)
+      . = ALIGN(4);
+      PROVIDE( _ebss = .);
+    } >RAM AT>FLASH
+    PROVIDE( _end = _ebss);
+ PROVIDE( end = . );
+ PROVIDE( _eusrstack = ORIGIN(RAM) + LENGTH(RAM));
+    /DISCARD/ : {
+      *(.note .note.*)
+      *(.eh_frame .eh_frame.*)
+      *(.comment .comment.*)
+      *(.ARM.extab* .gnu.linkonce.armextab.*)
+      *(.ARM.exidx*)
+    }
+}