Add --enable-function-sections option to configure. With this option,
the compiler will emit each function in a separate named text section,
on supported targets. This enables function reordering using a linker
script. With this option, the compiler also emits caml_hot__code_begin
and caml_hot__code_end sections. This allows a linker script to
move function sections outside of the segments they belong to,
without breaking caml_code_segments.
There were some issues in the way parameters from Makefile.config
are inserted in utils/config.mlp to produce utils/config.ml:
- Some of the make functions involved used parameter "$2" yet
were called with only one argument, causing a warning by
"make --warn-undefined-variables".
- Despite heroic attempts, special characters in the parameters
were not always quoted or quoted enough. For example,
if FLEXDLL_DIR is C:\foo, the generated utils/config.ml
contains "C:\foo", which is not a valid OCaml string literal.
This commit fixes these issues by:
- Revising and commenting the make functions that produce
the properly-quoted sed substitution commands.
- Adding an extra round of quoting for variables used inside
OCaml's string literals "..." (function SUBST_STRING)
- Adding two round-trip tests (make test-subst, make test-subst-string)
to make sure that all printable characters are properly quoted.
This commit removes support for gprof-based profiling (the -p option to ocamlopt). It follows a discussion on the core developers' list, which indicated that removing gprof support was a reasonable thing to do. The rationale is that there are better easy-to-use profilers out there now, such as perf for Linux and Instruments on macOS; and the gprof support has always been patchy across targets. We save a whole build of the runtime and simplify some other parts of the codebase by removing it.
Nicolás Ojeda Bär
David Allsopp
Greta Yorsh
Xavier Leroy
Mark Shinwell
Thomas Refis
Thomas Refis