mkdep: make argument of findcc const

Previously, findcc modified its argument string, even though it had been
declared as 'const char *'. This triggered a lint warning that "strchr
effectively discards 'const char *' from argument", in fact, this code
caused the lint check to be implemented in the first place.

The first attempt at fixing it by removing the 'const' from the
parameter type was a bad idea since it made the API of that function
more complicated.

Revert back to making the parameter a 'const char *' and duplicate that
string internally as necessary. Add a few more tests for absolute
pathnames since these had been missing before. There are no tests yet
for snprintf with too long strings, but the current change does not
modify that part of the code.

mkdep: fix string constness in call to findcc

deconst -> __UNCONST to avoid null pointer arithmetic

branches: 1.44.14;
fix some error handling.

Conditionally include the depend files.

add -i and -v

branches: 1.41.2;
Add a new "-P prefix" option to mkdep(1).

This option prepends the string given in prefix to every target
filename. This is useful for programs that have source files in
multiple subdirectories and a single Makefile that references all of
them explicitly (without using the VPATH functionality because there
can be files with the same name in each subdirectory).

branches: 1.40.2;
ANSIfy + static + __dead

dependant -> dependent

Don't touch before the mmap'ed region.

Handle the empty suffix properly. Convert suffix list to a list from an
array and don't have limits in the suffix length. Also don't require that
suffixes have a single dot.

Recognize --sysroot but don't document it or do anything about it for now.

fix empty suffix case.

PR/43364: Nicolas Joly: mkdep(1) wrong target names when suffix list miss .o

fix -Wcast-qual & -Wsign-compare issues

branches: 1.32.6;
Remove the \n and tabs from the __COPYRIGHT() strings.
Tweak to use a consistent format.

branches: 1.31.2;
Remove clause 3 and 4 from TNF licenses

branches: 1.30.6;
remove unnecessary #include

branches: 1.29.8;
- make a variable volatile, that gcc warns vfork will clobber.
- don't blindly walk before the beginning of the buffer because of a
corrupt dependency file. In this case the first character of the
dependency file was a :

make this compile again.

plug leaks, coverity cids 92, 93.

Sort options.

Add a -D option that acts like -d, but reads the filenames (whitespace
separated) from stdin.
Useful (eg in Makefile.kern.inc) to avoid breaking the systems command
line limit.

Initialize a couple of local variables to appease -Wuninitialized.
Marked with XXXGCC for sun2 (found while compiling for it).

Reviewed by lukem.

Sync usage with man page. From Kouichirou Hiratsuka in PR 26224.

Redo code that expands the 'xxx.o' to 'xxx.o xxx.so xxx.po xxx.ln' so that
is doesn't care which of the wanted suffixes are in the input file.
Needed for my autodepend code where you don't know which compilation ran last.

Only emit each filename once in a single .OPTIONAL line when -o is given.
(Saves several MB for kernel .depend files.)

Don't rely on mmap giving a NUL terminated buffer.
Let '--' be used to separate options to mkdep from those to cc.

Fix continuation line handling.

Add the following options with a view to using 'cc -MD' to automatically
create dependency files:
-d process xxx.d files to generate .depend (don't run ${CC})
-o add .OPTIONAL: <headers> to output file
-q don't print warnins for missing files (with -d)
-s suf list of suffixes to replace ".o"
The -s suf should allow all the 'afterdepend' stuff to be killed.
(christos thought this might be a good idea...)

Overhaul how `build.sh tools' are used:

* Rename "config.h" to "nbtool_config.h" and
HAVE_CONFIG_H to HAVE_NBTOOL_CONFIG_H.
This makes in more obvious in the source when we're using
tools/compat/config.h versus "standard autoconf" config.h

* Consistently move the inclusion of nbtool_config.h to before
<sys/cdefs.h> so that the former can provide __RCSID() (et al),
and there's no need to protect those macros any more.

These changes should make it easier to "tool-ify" a program by adding:
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
to the top of the source files (for the general case).

catch SIGPIPE, too.

Backing this out until it works.

When an unknown option is found, ignore it, as it may be cc related (i.e.,
-D and -I options).

Use getopt(3) instead of specific code to parse options.
Reviewed by jdolecek.

catch SIGINT, SIGHUP, SIGQUIT and SIGTERM to clear a temporary file.

Split out the findcc() function that tries to determine the path to
the C compiler so other programs can use it.

branches: 1.10.2;
Roll in fixes to permit cross-compiling from non-NetBSD hosts. This
round has been tested on Solaris/x86 and Linux hosts.

* Add host tools cap_mkdb, ctags, m4, uudecode.
* Protect __RCSID() and __COPYRIGHT() better.
* Reduce the number of places that need to include "config.h", to keep
sources closer to their "vanilla" versions.
* Add more compat #defines and autoconf-checked functions.

Add hooks for cross-hosting on non-NetBSD platforms.

a couple of tiny whitespace cleanups

get closer to KNF.

convert uses of hard-coded string "mkdep" to use getprogname().

call setprogname(argv[0]) at start of main()

branches: 1.4.8;
Rather than hardcoding _PATH_TMP (and relying on const string concatenation),
try TMPDIR (if set in the environment).

* Make usage string reflect reality,
* declare internal utility functions static,
* remove unneeded workarounds for bogus -Wuninitialized reports,
* delint.

Do something sane if we have CC='cc -pipe' set

branches: 1.1.1;
Initial revision

deconst -> __UNCONST to avoid null pointer arithmetic

branches: 1.44.14;
fix some error handling.

Conditionally include the depend files.

add -i and -v

branches: 1.41.2;
Add a new "-P prefix" option to mkdep(1).

This option prepends the string given in prefix to every target
filename. This is useful for programs that have source files in
multiple subdirectories and a single Makefile that references all of
them explicitly (without using the VPATH functionality because there
can be files with the same name in each subdirectory).

branches: 1.40.2;
ANSIfy + static + __dead

dependant -> dependent

Don't touch before the mmap'ed region.

Handle the empty suffix properly. Convert suffix list to a list from an
array and don't have limits in the suffix length. Also don't require that
suffixes have a single dot.

Recognize --sysroot but don't document it or do anything about it for now.

fix empty suffix case.

PR/43364: Nicolas Joly: mkdep(1) wrong target names when suffix list miss .o

fix -Wcast-qual & -Wsign-compare issues

branches: 1.32.6;
Remove the \n and tabs from the __COPYRIGHT() strings.
Tweak to use a consistent format.

branches: 1.31.2;
Remove clause 3 and 4 from TNF licenses

branches: 1.30.6;
remove unnecessary #include

branches: 1.29.8;
- make a variable volatile, that gcc warns vfork will clobber.
- don't blindly walk before the beginning of the buffer because of a
corrupt dependency file. In this case the first character of the
dependency file was a :

make this compile again.

plug leaks, coverity cids 92, 93.

Sort options.

Add a -D option that acts like -d, but reads the filenames (whitespace
separated) from stdin.
Useful (eg in Makefile.kern.inc) to avoid breaking the systems command
line limit.

Initialize a couple of local variables to appease -Wuninitialized.
Marked with XXXGCC for sun2 (found while compiling for it).

Reviewed by lukem.

Sync usage with man page. From Kouichirou Hiratsuka in PR 26224.

Redo code that expands the 'xxx.o' to 'xxx.o xxx.so xxx.po xxx.ln' so that
is doesn't care which of the wanted suffixes are in the input file.
Needed for my autodepend code where you don't know which compilation ran last.

Only emit each filename once in a single .OPTIONAL line when -o is given.
(Saves several MB for kernel .depend files.)

Don't rely on mmap giving a NUL terminated buffer.
Let '--' be used to separate options to mkdep from those to cc.

Fix continuation line handling.

Add the following options with a view to using 'cc -MD' to automatically
create dependency files:
-d process xxx.d files to generate .depend (don't run ${CC})
-o add .OPTIONAL: <headers> to output file
-q don't print warnins for missing files (with -d)
-s suf list of suffixes to replace ".o"
The -s suf should allow all the 'afterdepend' stuff to be killed.
(christos thought this might be a good idea...)

Overhaul how `build.sh tools' are used:

* Rename "config.h" to "nbtool_config.h" and
HAVE_CONFIG_H to HAVE_NBTOOL_CONFIG_H.
This makes in more obvious in the source when we're using
tools/compat/config.h versus "standard autoconf" config.h

* Consistently move the inclusion of nbtool_config.h to before
<sys/cdefs.h> so that the former can provide __RCSID() (et al),
and there's no need to protect those macros any more.

These changes should make it easier to "tool-ify" a program by adding:
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
to the top of the source files (for the general case).

catch SIGPIPE, too.

Backing this out until it works.

When an unknown option is found, ignore it, as it may be cc related (i.e.,
-D and -I options).

Use getopt(3) instead of specific code to parse options.
Reviewed by jdolecek.

catch SIGINT, SIGHUP, SIGQUIT and SIGTERM to clear a temporary file.

Split out the findcc() function that tries to determine the path to
the C compiler so other programs can use it.

branches: 1.10.2;
Roll in fixes to permit cross-compiling from non-NetBSD hosts. This
round has been tested on Solaris/x86 and Linux hosts.

* Add host tools cap_mkdb, ctags, m4, uudecode.
* Protect __RCSID() and __COPYRIGHT() better.
* Reduce the number of places that need to include "config.h", to keep
sources closer to their "vanilla" versions.
* Add more compat #defines and autoconf-checked functions.

Add hooks for cross-hosting on non-NetBSD platforms.

a couple of tiny whitespace cleanups

get closer to KNF.

convert uses of hard-coded string "mkdep" to use getprogname().

call setprogname(argv[0]) at start of main()

branches: 1.4.8;
Rather than hardcoding _PATH_TMP (and relying on const string concatenation),
try TMPDIR (if set in the environment).

* Make usage string reflect reality,
* declare internal utility functions static,
* remove unneeded workarounds for bogus -Wuninitialized reports,
* delint.

Do something sane if we have CC='cc -pipe' set

branches: 1.1.1;
Initial revision