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After further examining the iffe code I found that fail{ ... }end as well as pass{ ... }end blocks are executed in iffe's current environment, using a simple 'eval', with no safeguards whatsoever! This does of course afford maximum flexibility... for example, a block can 'exit 1' to abort the iffe run and the whole build with it. We can use this to abort properly on fatal compilation errors. src/cmd/INIT/iffe.sh: - Complete the fail{ and pass{ documentation; it should really be known that they run in iffe's current environment. - Make one change: for just the 'eval' command that runs these blocks, redirect standard error back to the saved $stderr file descriptor so these blocks can write error messages using the standard >&2 instead of the undocumented >&$stderr. src/lib/**/features/*: - Write error message to standard error and error out properly when an output{ ... }end block fails to compile, instead of writing an #error directive to error out later.
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8 changed files with 30 additions and 15 deletions
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@ -32,7 +32,7 @@ AIX) unset LIBPATH ;;
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esac
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command=iffe
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version=2021-12-22
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version=2021-12-31
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compile() # $cc ...
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{
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@ -873,8 +873,8 @@ case `(getopts '[-][123:xyz]' opt --xyz; echo 0$opt) 2>/dev/null` in
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}
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[+?\abegin\a\b{\b ... \b}end\b delimit multiline code blocks that override
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or augment the default code provided by \biffe\b. User supplied code
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blocks should be compatible with the K&R, ANSI, and C++ C language
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dialects for maximal portability. Test code may call the function
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blocks should be compatible with the C89/C90 C language
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standard for maximal portability. Test code may call the function
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\bNOTE("...")\b to emit short text in \b--verbose\b output; only one
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\bNOTE()\b should be called per test for readability. In addition to
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all macro definitions generated by previous tests, all generated
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@ -1066,7 +1066,12 @@ case `(getopts '[-][123:xyz]' opt --xyz; echo 0$opt) 2>/dev/null` in
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[+execute?The block is compiled, linked, and executed. \b0\b exit
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status means success.]
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[+fail?If the test fails then the block text is evaluated by
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\bsh\b(1).]
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\bsh\b(1) in \biffe\b'\'$'s current shell environment.
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Changes in the shell state, such as variables, will survive the block.
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Standard input is redirected to \b/dev/null\b.
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Standard output is copied to the output file.
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Standard error may be used to log informative or error messages.
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The block may use \bexit\b to abort the \biffe\b run.]
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[+link?The block is compiled and linked (\bcc -o\b).]
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[+macro?The block is preprocessed (\bcc -E\b) and lines containing
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text bracketed by \b<<"\b ... \b">>\b (\aless-than\a \aless-than\a
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@ -1080,7 +1085,7 @@ case `(getopts '[-][123:xyz]' opt --xyz; echo 0$opt) 2>/dev/null` in
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[+output?The block is compiled, linked, and executed, and the output
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is copied to the output file.]
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[+pass?If the test succeeds then the block text is evaluated by
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\bsh\b(1).]
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\bsh\b(1) in the same manner as \bfail\b above.]
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[+preprocess?The block is preprocessed (\bcc -E\b).]
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[+run?The block is executed as a shell script and the output is
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copied to the output file. Successful test macros are also
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@ -4543,7 +4548,8 @@ struct xxx* f() { return &v; }"
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*) user_pf=$pass user_yn=$yes ;;
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esac
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case $user_pf in
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?*) eval "$user_pf" <&$nullin ;;
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?*) # Run a pass{ or fail{ block in iffe's current environment
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eval "$user_pf" <&$nullin 2>&$stderr ;;
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esac
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case $user_yn in
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?*) case $def in
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@ -50,7 +50,8 @@ tst - -lm output{
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return 0;
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}
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}end fail{
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echo '#error The output block in src/cmd/builtin/features/pty failed to compile. Rebuild with IFFEFLAGS=-d1 to debug.'
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echo "$0: Output block failed to compile. Export IFFEFLAGS=-d1 to debug." >&2
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exit 1
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}end
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extern _getpty char* (int*, int, mode_t, int)
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@ -319,7 +319,8 @@ tst - output{
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return 0;
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}
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}end fail{
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echo '#error Output block #2 in src/lib/libast/features/common failed to compile. Rebuild with IFFEFLAGS=-d1 to debug.'
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echo "$0: Output block failed to compile. Export IFFEFLAGS=-d1 to debug." >&2
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exit 1
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}end
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tst - -DN=1 - -DN=0 output{
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@ -890,7 +890,8 @@ tst - note{ missing floating point limits }end output{
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return 0;
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}
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}end fail{
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echo '#error Output block #1 in src/lib/libast/features/float failed to compile. Rebuild with IFFEFLAGS=-d1 to debug.'
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echo "$0: Output block failed to compile. Export IFFEFLAGS=-d1 to debug." >&2
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exit 1
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}end
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tst - note{ double exponent bitfoolery }end output{
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@ -926,7 +927,8 @@ tst - note{ double exponent bitfoolery }end output{
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return 0;
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}
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}end fail{
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echo '#error Output block #2 in src/lib/libast/features/float failed to compile. Rebuild with IFFEFLAGS=-d1 to debug.'
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echo "$0: Output block failed to compile. Export IFFEFLAGS=-d1 to debug." >&2
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exit 1
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}end
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tst - note{ long double exponent bitfoolery }end output{
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@ -962,7 +964,8 @@ tst - note{ long double exponent bitfoolery }end output{
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return 0;
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}
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}end fail{
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echo '#error Output block #3 in src/lib/libast/features/float failed to compile. Rebuild with IFFEFLAGS=-d1 to debug.'
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echo "$0: Output block failed to compile. Export IFFEFLAGS=-d1 to debug." >&2
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exit 1
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}end
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tst - -DN=1 - -DN=2 note{ _ast_fltmax_t maximum integral type }end output{
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@ -659,7 +659,8 @@ tst - output{
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}
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}end fail{
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echo '#error The output block in src/lib/libast/features/lib failed to compile. Rebuild with IFFEFLAGS=-d1 to debug.'
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echo "$0: Output block failed to compile. Export IFFEFLAGS=-d1 to debug." >&2
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exit 1
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}end
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tst no64 note{ largefile 64 broken }end execute{
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@ -15,7 +15,8 @@ tst - note{ number of bits in pointer }end output{
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return 0;
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}
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}end fail{
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echo '#error The output block in src/lib/libast/features/sfio failed to compile. Rebuild with IFFEFLAGS=-d1 to debug.'
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echo "$0: Output block failed to compile. Export IFFEFLAGS=-d1 to debug." >&2
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exit 1
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}end
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tst tmp_rmfail note{ open files cannot be removed }end execute{
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@ -11,5 +11,6 @@ tst - note{ sizeof(integral-type) }end output{
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return 0;
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}
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}end fail{
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echo '#error The output block in src/lib/libast/features/sizeof failed to compile. Rebuild with IFFEFLAGS=-d1 to debug.'
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echo "$0: Output block failed to compile. Export IFFEFLAGS=-d1 to debug." >&2
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exit 1
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}end
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@ -261,5 +261,6 @@ tst - -lm output{
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return 0;
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}
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}end fail{
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echo '#error The output block in src/lib/libdll/features/dll failed to compile. Rebuild with IFFEFLAGS=-d1 to debug.'
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echo "$0: Output block failed to compile. Export IFFEFLAGS=-d1 to debug." >&2
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exit 1
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}end
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