Bryon Quackenbush via Gcc kirjoitti 15.10.2024 klo 19.09:
Does anyone know where in the GCC hierarchy that I can find implementation
code for standard C library functions like fgetc / fputs, etc, or would
that be outside the scope of GCC? I've been hunting around on the source
tree for the last few days and found the headers, but not the
implementation.
This is really a very old misunderstanding when one reads about a "free
C compiler" for
some familiar system which is missing this and buying it as a
"Development System"
addition looks too expensive. For me it happened with the "SCO Unix 386"
for 32-bit
PCs, the required "Standard C library" came with the "Development
System" add-on for
the "Basic System" so this sounded being a "Catch 22" situation : If you
have the
Development System you don't need any extra C compiler because you
already have it.
Meanwhile "GCC for MS-DOS" included the DJGPP C-library for DOS. Most
Unix systems
at that time included at least the Standard C libraries but sold the
compilers as add-ons.
Ok, providing a "Standard C library for all possible systems" is quite
impossible because
it should communicate with the operating system, the provided firmware
or the raw
hardware on the target system. The well-known "newlib" for embedded
systems includes
many separate "glue libraries"("libgloss") for different embedded
targets and boards :
https://sourceware.org/newlib/
For usual operating systems like the Linux distros, Oracle Solarises,
different Unices, MS
Windows etc there are pre-made standard C libraries which are used with GCC.
Thanks for the help.
- Bryon
