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Diffstat (limited to 'autosetup/teaish/feature.tcl')
| -rw-r--r-- | autosetup/teaish/feature.tcl | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/autosetup/teaish/feature.tcl b/autosetup/teaish/feature.tcl new file mode 100644 index 000000000..6c927d1a7 --- /dev/null +++ b/autosetup/teaish/feature.tcl @@ -0,0 +1,214 @@ +######################################################################## +# 2025 April 7 +# +# The author disclaims copyright to this source code. In place of +# a legal notice, here is a blessing: +# +# * May you do good and not evil. +# * May you find forgiveness for yourself and forgive others. +# * May you share freely, never taking more than you give. +# +######################################################################## +# ----- @module feature-tests.tcl ----- +# @section TEA-ish collection of feature tests. +# +# Functions in this file with a prefix of teaish__ are +# private/internal APIs. Those with a prefix of teaish- are +# public APIs. + + +# @teaish-check-libz +# +# Checks for zlib.h and the function deflate in libz. If found, +# prepends -lz to the extension's ldflags and returns 1, else returns +# 0. It also defines LDFLAGS_LIBZ to the libs flag. +# +proc teaish-check-libz {} { + teaish-check-cached "Checking for libz" { + set rc 0 + if {[msg-quiet cc-check-includes zlib.h] && [msg-quiet proj-check-function-in-lib deflate z]} { + teaish-ldflags-prepend [define LDFLAGS_LIBZ [get-define lib_deflate]] + undefine lib_deflate + incr rc + } + expr $rc + } +} + +# @teaish-check-librt ?funclist? +# +# Checks whether -lrt is needed for any of the given functions. If +# so, appends -lrt via [teaish-ldflags-prepend] and returns 1, else +# returns 0. It also defines LDFLAGS_LIBRT to the libs flag or an +# empty string. +# +# Some systems (ex: SunOS) require -lrt in order to use nanosleep. +# +proc teaish-check-librt {{funclist {fdatasync nanosleep}}} { + teaish-check-cached -nostatus "Checking whether ($funclist) need librt" { + define LDFLAGS_LIBRT "" + foreach func $funclist { + if {[msg-quiet proj-check-function-in-lib $func rt]} { + set ldrt [get-define lib_${func}] + undefine lib_${func} + if {"" ne $ldrt} { + teaish-ldflags-prepend -r [define LDFLAGS_LIBRT $ldrt] + msg-result $ldrt + return 1 + } else { + msg-result "no lib needed" + return 1 + } + } + } + msg-result "not found" + return 0 + } +} + +# @teaish-check-stdint +# +# A thin proxy for [cc-with] which checks for <stdint.h> and the +# various fixed-size int types it declares. It defines HAVE_STDINT_T +# to 0 or 1 and (if it's 1) defines HAVE_XYZ_T for each XYZ int type +# to 0 or 1, depending on whether its available. +proc teaish-check-stdint {} { + teaish-check-cached "Checking for stdint.h" { + msg-quiet cc-with {-includes stdint.h} \ + {cc-check-types int8_t int16_t int32_t int64_t intptr_t \ + uint8_t uint16_t uint32_t uint64_t uintptr_t} + } +} + +# @teaish-is-mingw +# +# Returns 1 if building for mingw, else 0. +proc teaish-is-mingw {} { + return [expr { + [string match *mingw* [get-define host]] && + ![file exists /dev/null] + }] +} + +# @teaish-check-libdl +# +# Checks for whether dlopen() can be found and whether it requires +# -ldl for linking. If found, returns 1, defines LDFLAGS_DLOPEN to the +# linker flags (if any), and passes those flags to +# teaish-ldflags-prepend. It unconditionally defines HAVE_DLOPEN to 0 +# or 1 (the its return result value). +proc teaish-check-dlopen {} { + teaish-check-cached -nostatus "Checking for dlopen()" { + set rc 0 + set lfl "" + if {[cc-with {-includes dlfcn.h} { + cctest -link 1 -declare "extern char* dlerror(void);" -code "dlerror();"}]} { + msg-result "-ldl not needed" + incr rc + } elseif {[cc-check-includes dlfcn.h]} { + incr rc + if {[cc-check-function-in-lib dlopen dl]} { + set lfl [get-define lib_dlopen] + undefine lib_dlopen + msg-result " dlopen() needs $lfl" + } else { + msg-result " - dlopen() not found in libdl. Assuming dlopen() is built-in." + } + } else { + msg-result "not found" + } + teaish-ldflags-prepend [define LDFLAGS_DLOPEN $lfl] + define HAVE_DLOPEN $rc + } +} + +# +# @teaish-check-libmath +# +# Handles the --enable-math flag. Returns 1 if found, else 0. +# If found, it prepends -lm (if needed) to the linker flags. +proc teaish-check-libmath {} { + teaish-check-cached "Checking for libc math library" { + set lfl "" + set rc 0 + if {[msg-quiet proj-check-function-in-lib ceil m]} { + incr rc + set lfl [get-define lib_ceil] + undefine lib_ceil + teaish-ldflags-prepend $lfl + msg-checking "$lfl " + } + define LDFLAGS_LIBMATH $lfl + expr $rc + } +} + +# @teaish-import-features ?-flags? feature-names... +# +# For each $name in feature-names... it invokes: +# +# use teaish/feature/$name +# +# to load TEAISH_AUTOSETUP_DIR/feature/$name.tcl +# +# By default, if a proc named teaish-check-${name}-options is defined +# after sourcing a file, it is called and its result is passed to +# proj-append-options. This can be suppressed with the -no-options +# flag. +# +# Flags: +# +# -no-options: disables the automatic running of +# teaish-check-NAME-options, +# +# -run: if the function teaish-check-NAME exists after importing +# then it is called. This flag must not be used when calling this +# function from teaish-options. This trumps both -pre and -post. +# +# -pre: if the function teaish-check-NAME exists after importing +# then it is passed to [teaish-checks-queue -pre]. +# +# -post: works like -pre but instead uses[teaish-checks-queue -post]. +proc teaish-import-features {args} { + set pk "" + set doOpt 1 + proj-parse-simple-flags args flags { + -no-options 0 {set doOpt 0} + -run 0 {expr 1} + -pre 0 {set pk -pre} + -post 0 {set pk -post} + } + # + # TODO: never import the same module more than once. The "use" + # command is smart enough to not do that but we would need to + # remember whether or not any teaish-check-${arg}* procs have been + # called before, and skip them. + # + if {$flags(-run) && "" ne $pk} { + proj-error "Cannot use both -run and $pk" \ + " (called from [proj-scope 1])" + } + + foreach arg $args { + uplevel "use teaish/feature/$arg" + if {$doOpt} { + set n "teaish-check-${arg}-options" + if {[llength [info proc $n]] > 0} { + if {"" ne [set x [$n]]} { + options-add $x + } + } + } + if {$flags(-run)} { + set n "teaish-check-${arg}" + if {[llength [info proc $n]] > 0} { + uplevel 1 $n + } + } elseif {"" ne $pk} { + set n "teaish-check-${arg}" + if {[llength [info proc $n]] > 0} { + teaish-checks-queue {*}$pk $n + } + } + } +} |