diff options
Diffstat (limited to 'contrib/sqlite3/autosetup/pkg-config.tcl')
| -rw-r--r-- | contrib/sqlite3/autosetup/pkg-config.tcl | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/contrib/sqlite3/autosetup/pkg-config.tcl b/contrib/sqlite3/autosetup/pkg-config.tcl new file mode 100644 index 000000000000..9ce7111f55c1 --- /dev/null +++ b/contrib/sqlite3/autosetup/pkg-config.tcl @@ -0,0 +1,168 @@ +# Copyright (c) 2016 WorkWare Systems http://www.workware.net.au/ +# All rights reserved + +# @synopsis: +# +# The 'pkg-config' module allows package information to be found via 'pkg-config'. +# +# If not cross-compiling, the package path should be determined automatically +# by 'pkg-config'. +# If cross-compiling, the default package path is the compiler sysroot. +# If the C compiler doesn't support '-print-sysroot', the path can be supplied +# by the '--sysroot' option or by defining 'SYSROOT'. +# +# 'PKG_CONFIG' may be set to use an alternative to 'pkg-config'. + +use cc + +options { + sysroot:dir => "Override compiler sysroot for pkg-config search path" +} + +# @pkg-config-init ?required? +# +# Initialises the 'pkg-config' system. Unless '$required' is set to 0, +# it is a fatal error if a usable 'pkg-config' is not found . +# +# This command will normally be called automatically as required, +# but it may be invoked explicitly if lack of 'pkg-config' is acceptable. +# +# Returns 1 if ok, or 0 if 'pkg-config' not found/usable (only if '$required' is 0). +# +proc pkg-config-init {{required 1}} { + if {[is-defined HAVE_PKG_CONFIG]} { + return [get-define HAVE_PKG_CONFIG] + } + set found 0 + + define PKG_CONFIG [get-env PKG_CONFIG pkg-config] + msg-checking "Checking for pkg-config..." + + if {[catch {exec [get-define PKG_CONFIG] --version} version]} { + msg-result "[get-define PKG_CONFIG] (not found)" + if {$required} { + user-error "No usable pkg-config" + } + } else { + msg-result $version + define PKG_CONFIG_VERSION $version + + set found 1 + + if {[opt-str sysroot o]} { + define SYSROOT [file-normalize $o] + msg-result "Using specified sysroot [get-define SYSROOT]" + } elseif {[get-define build] ne [get-define host]} { + if {[catch {exec-with-stderr {*}[get-define CC] -print-sysroot} result errinfo] == 0} { + # Use the compiler sysroot, if there is one + define SYSROOT $result + msg-result "Found compiler sysroot $result" + } else { + configlog "[get-define CC] -print-sysroot: $result" + set msg "pkg-config: Cross compiling, but no compiler sysroot and no --sysroot supplied" + if {$required} { + user-error $msg + } else { + msg-result $msg + } + set found 0 + } + } + if {[is-defined SYSROOT]} { + set sysroot [get-define SYSROOT] + + # XXX: It's possible that these should be set only when invoking pkg-config + global env + set env(PKG_CONFIG_DIR) "" + # Supposedly setting PKG_CONFIG_LIBDIR means that PKG_CONFIG_PATH is ignored, + # but it doesn't seem to work that way in practice + set env(PKG_CONFIG_PATH) "" + # Do we need to try /usr/local as well or instead? + set env(PKG_CONFIG_LIBDIR) $sysroot/usr/lib/pkgconfig:$sysroot/usr/share/pkgconfig + set env(PKG_CONFIG_SYSROOT_DIR) $sysroot + } + } + define HAVE_PKG_CONFIG $found + return $found +} + +# @pkg-config module ?requirements? +# +# Use 'pkg-config' to find the given module meeting the given requirements. +# e.g. +# +## pkg-config pango >= 1.37.0 +# +# If found, returns 1 and sets 'HAVE_PKG_PANGO' to 1 along with: +# +## PKG_PANGO_VERSION to the found version +## PKG_PANGO_LIBS to the required libs (--libs-only-l) +## PKG_PANGO_LDFLAGS to the required linker flags (--libs-only-L) +## PKG_PANGO_CFLAGS to the required compiler flags (--cflags) +# +# If not found, returns 0. +# +proc pkg-config {module args} { + set ok [pkg-config-init] + + msg-checking "Checking for $module $args..." + + if {!$ok} { + msg-result "no pkg-config" + return 0 + } + + set pkgconfig [get-define PKG_CONFIG] + + set ret [catch {exec $pkgconfig --modversion "$module $args"} version] + configlog "$pkgconfig --modversion $module $args: $version" + if {$ret} { + msg-result "not found" + return 0 + } + # Sometimes --modversion succeeds but because of dependencies it isn't usable + # This seems to show up with --cflags + set ret [catch {exec $pkgconfig --cflags $module} cflags] + if {$ret} { + msg-result "unusable ($version - see config.log)" + configlog "$pkgconfig --cflags $module" + configlog $cflags + return 0 + } + msg-result $version + set prefix [feature-define-name $module PKG_] + define HAVE_${prefix} + define ${prefix}_VERSION $version + define ${prefix}_CFLAGS $cflags + define ${prefix}_LIBS [exec $pkgconfig --libs-only-l $module] + define ${prefix}_LDFLAGS [exec $pkgconfig --libs-only-L $module] + return 1 +} + +# @pkg-config-get module setting +# +# Convenience access to the results of 'pkg-config'. +# +# For example, '[pkg-config-get pango CFLAGS]' returns +# the value of 'PKG_PANGO_CFLAGS', or '""' if not defined. +proc pkg-config-get {module name} { + set prefix [feature-define-name $module PKG_] + get-define ${prefix}_${name} "" +} + +# @pkg-config-get-var module variable +# +# Return the value of the given variable from the given pkg-config module. +# The module must already have been successfully detected with pkg-config. +# e.g. +# +## if {[pkg-config harfbuzz >= 2.5]} { +## define harfbuzz_libdir [pkg-config-get-var harfbuzz libdir] +## } +# +# Returns the empty string if the variable isn't defined. +proc pkg-config-get-var {module variable} { + set pkgconfig [get-define PKG_CONFIG] + set prefix [feature-define-name $module HAVE_PKG_] + exec $pkgconfig $module --variable $variable +} |