Updated the
stated size and information relating to the
double type, which is now 64 bits
wide.
Corrected
examples of using the __pack
specifier.
Updated
information on the compiler option controls available in the
MPLAB X IDE.
Provided
dedicated sections on all compiler options in addition to a
summary table.
Added new section
on the compiler's code coverage feature.
Added a new
section on the stack and the stack guidance feature.
Added
-f[no-]common option description,
which controls the placement of global variables defined
without an initializer.
Added
-Warray-bounds option description,
which can warn on out-of-bounds array indices and pointer
offsets.
Added
-Wmultistatement-macros option
description, which warns on unsafe macro expansion.
Added
-Wsizeof-pointer-div option
description, which warns on suspicious divisions involving
pointers.
Indicated that
the -foptimize-register-move option no
longer has any effect.
Added information
on the iar argument to the
-mext option.
Added information
on the used variable attribute.
Added information
on the externally_visible function
attribute and variable attribute.
Expanded
information on the naked function
attribute.
Updated and
expanded the sections relating to variables in program
memory, reflecting changes in the compiler.
Expanded
information on fixed-point types and arithmetic.
Expanded
information on interrupt context switching.
Updated
information on the runtime startup code, including
information on the data initialization template.
Added information
on smart IO library features.
Expanded
information on optimizations performed.
Added section on
preprocessor arithmetic.
Added information
on the default_function_attributes,
default_variable_attributes,
message, GCC
optimize, pack, and
weak pragmas.
Removed reference
to the __PIC__ and __pic__
position independent code macros, which are no longer
supported.
Indicated in the
default linker script information that selecting an
alternate DFP will affect the script used.
Added information
on __builtin_mfc0 and
__builtin_mtc0 built-in
functions.
Corrected
information relating to the return value for the
__builtin_bcc0,
__builtin_bsc0, and
__builtin_bcsc0 built-in
functions.
Revision D (September
2023)
Merged the
MIPS-related library content in the 32-Bit Language
Tools Libraries document into this
guide.
Updated
references to the C++ standard to reflect that the ISO/IEC
14882:2014 C++ program language is now supported.
Renamed
references to the MPLAB XC16 compiler to be MPLAB XC-DSC to
reflect the change in product name.
Defined the
compiler's implementation-defined behavior for the C++14
standard in a new section.
Clarified
information in the runtime startup section.
Updated Common C
Interface chapter to reflect recent changes in MPLAB XC
compilers.
Removed reference
to MPLAB XC8 in the Embedded Compiler Compatibility
Mode chapter, as this compiler no longer
supports this mode.
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.
