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New BIF os:unsetenv/1 which deletes an environment variable and
returns 'true'.
Does not change any old functionality.
Calls the libc function unsetenv(3) on UNIX and
SetEnvironmentVariableW(key, NULL) on Windows. The unicode support
is the same as for os:getenv and os:putenv.
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* maint:
Update to work with space in include path
Update to work with whitespace in exec path
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OTP-10106
OTP-10107
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Conflicts:
erts/doc/src/erlang.xml
erts/emulator/beam/erl_process.c
erts/emulator/beam/erl_process.h
erts/emulator/test/bif_SUITE.erl
erts/preloaded/ebin/erlang.beam
erts/preloaded/src/erlang.erl
lib/hipe/cerl/erl_bif_types.erl
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erts/test/autoimport_SUITE tested that auto-import information in
erl_internal:bif/2 was consistent with the documentation. It did
it by scanning erlang.xml.
Since the documentation is now based on the specs in erlang.erl,
we should now test consistency of the specs and erl_internal:bif/2.
Since anyone that adds a new BIF runs the emulator test suite, it
makes sense to do this test in bif_SUITE in the emulator test suite.
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Rename the existing types/1 test case to erl_bif_types/1 to make
it clearer what it does. Also no longer test for missing type
information for BIFs (since it has become optional), but only
check that the information provided seems to be consistent.
Introduce the specs/1 test case to ensure that all BIFs have
specs.
Also introduce improper_bif_stubs/1 to check for proper stubs.
Since the BEAM loader will now silently allow stubs for BIFs, we
want to be particular about exactly what a stub look like, so that
an Erlang function is not unintentionally overridden by a BIF.
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Add a test that will verify that BIFs have type information in
hiper/cerl/erl_bif_types.erl.
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* origin/pan/otp_8579_autoimport_override:
Update preloaded modules
Update primary bootstrap
Remove outcommented code from erl_lint
Make port_command/3 auto-imported
Remove (harmless) warnings about min/max in core applications
Autoimport min/2 and max/2
Improve coverage of erl_int in testcases
Change warning to error for nowarn_bif_clash compiler directive
Add -compile({no_auto_import,[F/A]}) doc to compiler.xml
Add some testcases to compiler to verify that overriding really happens
Return nowarn_bif_clash functionality but with warning
Teach erl_lint to better override BIFs with local functions and imports
Teach compiler to override autoimport with import
First prototype for local functions overriding autoimported
OTP-8579 Local functions should override auto-imported
Local and imported functions now override the autoimported
BIFs when the names clash. The pre R14 behaviour was that
autoimported BIFs would override local functions. To avoid
that old programs change behaviour, the following will
generate an error:
Doing a call without explicit module name to a local function
having a name clashing with the name of an autoimported BIF
that was present (and autoimported) before OTP R14A
Explicitly importing a function having a name clashing with
the name of an autoimported BIF that was present (and
autoimported) before OTP R14A Using any form of the old
compiler directive nowarn_bif_clash
If the BIF was added or autoimported in OTP R14A or later,
overriding it with an import or a local function will only
result in a warning,
To resolve clashes, you can either use the explicit module
name erlang to call the BIF, or you can remove the autoimport
of that specific BIF by using the new compiler directive
-compile({no_auto_import,[F/A]})., which makes all calls to
the local or imported function without explicit module name
pass without warnings or errors.
The change makes it possible to add autoimported BIFs without
breaking or silently changing old code in the future. However
some current code ingeniously utilizing the old behaviour or
the nowarn_bif_clash compiler directive, might need changing
to be accepted by the compiler.
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