Can you point me to the extconf.rb file of RMagick?
There is room definitely there is room to add more customization, but
I basedrake-compilerstructure in the PickAxe.
Please let me know if you make progress on this.
Thanks for your prompt reply, Luis. With the exception of the .so
filename I believe rake-compiler is working normally.
The extconf.rb for RMagick is below.
I recognize that rake-compiler wants "convention-over-configuration"
and that this can make it difficult to "import" existing projects,
especially those that don't match the convention. I appreciate your
patience.
Indeed, changing the name of the directory to RMagick2 causes rake-
compiler to know that the name of the .so file is RMagick2.so, at the
cost of changing the name of the directory. The directory structure,
which I based on setup.rb, has been my convention from the beginning
and I prefer not to change it. I believe that it is compatible with
the Pickaxe convention.
RMagick has both a Ruby part and a binary part. The Ruby part is
RMagick.rb and the binary part is RMagick2.so for RMagick 2 and simply
RMagick.so for RMagick 1.
require "mkmf"
require "date"
RMAGICK_VERS = "0.0.0"
MIN_RUBY_VERS = "1.8.2"
MIN_RUBY_VERS_NO = MIN_RUBY_VERS.tr(".","").to_i
MIN_IM_VERS = "6.3.0"
MIN_IM_VERS_NO = MIN_IM_VERS.tr(".","").to_i
# Test for a specific value in an enum type
def have_enum_value(enum, value, headers=nil, &b)
checking_for "#{enum}.#{value}" do
if try_compile(<<"SRC", &b)
#{COMMON_HEADERS}
#{cpp_include(headers)}
/*top*/
int main() { #{enum} t = #{value}; t = t; return 0; }
SRC
$defs.push(format("-DHAVE_ENUM_%s", value.upcase))
true
else
false
end
end
end
# Test for multiple values of the same enum type
def have_enum_values(enum, values, headers=nil, &b)
values.each do |value|
have_enum_value(enum, value, headers, &b)
end
end
def exit_failure(msg)
Logging::message msg
message msg+"\n"
exit(1)
end
# Seems like lots of people have multiple versions of ImageMagick
installed.
def check_multiple_imagemagick_versions()
versions = []
path = ENV['PATH'].split(File:
ATH_SEPARATOR)
path.each do |dir|
file = File.join(dir, "Magick-config")
if File.executable? file
vers = `#{file} --version`.chomp.strip
prefix = `#{file} --prefix`.chomp.strip
versions << [vers, prefix, dir]
end
end
versions.uniq!
if versions.size > 1
msg = "\nWarning: Found more than one ImageMagick installation.
This could cause problems at runtime.\n"
versions.each do |vers, prefix, dir|
msg << " #{dir}/Magick-config reports version #{vers}
is installed in #{prefix}\n"
end
msg << "Using #{versions[0][0]} from #{versions[0][1]}.\n\n"
Logging::message msg
message msg
end
end
if RUBY_PLATFORM =~ /mswin/
abort <<END_MSWIN
+----------------------------------------------------------------------------
+
| This rmagick gem is for use only on Linux, BSD, OS X, and similar
systems |
| that have a gnu or similar toolchain installed. The rmagick-win32
gem is a |
| pre-compiled version of RMagick bundled with ImageMagick for use
on |
| Microsoft Windows systems. The rmagick-win32 gem is available on
RubyForge.|
| See
http://rmagick.rubyforge.org/install-faq.html for more
information. |
+----------------------------------------------------------------------------
+
END_MSWIN
end
unless checking_for("Ruby version >= #{MIN_RUBY_VERS}") do
version = RUBY_VERSION.tr(".","").to_i
version >= MIN_RUBY_VERS_NO
end
exit_failure "Can't install RMagick #{RMAGICK_VERS}. Ruby #
{MIN_RUBY_VERS} or later required.\n"
end
# Magick-config is not available on Windows
if RUBY_PLATFORM !~ /mswin/
# Check for compiler. Extract first word so ENV['CC'] can be a
program name with arguments.
cc = (ENV["CC"] or Config::CONFIG["CC"] or "gcc").split(' ').first
unless find_executable(cc)
exit_failure "No C compiler found in ${ENV['PATH']}. See mkmf.log
for details."
end
# Check for Magick-config
unless find_executable("Magick-config")
exit_failure "Can't install RMagick #{RMAGICK_VERS}. Can't find
Magick-config in #{ENV['PATH']}\n"
end
check_multiple_imagemagick_versions()
# Ensure minimum ImageMagick version
unless checking_for("ImageMagick version >= #{MIN_IM_VERS}") do
version = `Magick-config --version`.chomp.tr(".","").to_i
version >= MIN_IM_VERS_NO
end
exit_failure "Can't install RMagick #{RMAGICK_VERS}. You must have
ImageMagick #{MIN_IM_VERS} or later.\n"
end
$magick_version = `Magick-config --version`.chomp
# Ensure ImageMagick is not configured for HDRI
unless checking_for("HDRI disabled version of ImageMagick") do
not (`Magick-config --version`["HDRI"])
end
exit_failure "\nCan't install RMagick #{RMAGICK_VERS}."+
"\nRMagick does not work when ImageMagick is configured for
High Dynamic Range Images."+
"\nDon't use the --enable-hdri option when configuring
ImageMagick.\n"
end
# Save flags
$CFLAGS = ENV["CFLAGS"].to_s + " " + `Magick-config --
cflags`.chomp
$CPPFLAGS = ENV["CPPFLAGS"].to_s + " " + `Magick-config --
cppflags`.chomp
$LDFLAGS = ENV["LDFLAGS"].to_s + " " + `Magick-config --
ldflags`.chomp
$LOCAL_LIBS = ENV["LIBS"].to_s + " " + `Magick-config --
libs`.chomp
else # mswin
`convert -version` =~ /Version: ImageMagick (\d\.\d\.\d+)-\d /
abort "Unable to get ImageMagick version" unless $1
$magick_version = $1
$CFLAGS = "-W3"
$CPPFLAGS = %Q{-I"C:\\Program Files\\Microsoft Platform SDK for
Windows Server 2003 R2\\Include" -I"C:\\Program Files\\ImageMagick-#
{$magick_version}-Q8\\include"}
# The /link option is required by the Makefile but causes warnings
in the mkmf.log file.
$LDFLAGS = %Q{/link /LIBPATH:"C:\\Program Files\\Microsoft Platform
SDK for Windows Server 2003 R2\\Lib" /LIBPATH:"C:\\Program Files\
\ImageMagick-#{$magick_version}-Q8\\lib" /LIBPATH:"C:\\ruby\\lib"}
$LOCAL_LIBS = 'CORE_RL_magick_.lib X11.lib'
end
#headers = %w{assert.h ctype.h errno.h float.h limits.h math.h
stdarg.h stddef.h stdint.h stdio.h stdlib.h string.h time.h}
headers = %w{assert.h ctype.h stdio.h stdlib.h math.h time.h}
headers << "stdint.h" if have_header("stdint.h") # defines uint64_t
headers << "sys/types.h" if have_header("sys/types.h")
unless have_header("magick/MagickCore.h")
exit_failure "Can't install RMagick #{RMAGICK_VERS}. Can't find
MagickCore.h.\n"
else
headers << "magick/MagickCore.h"
end
if RUBY_PLATFORM !~ /mswin/
unless have_library("Magick", "InitializeMagick", headers) ||
have_library("MagickCore", "InitializeMagick", headers) || have_library
("Magick++", "InitializeMagick")
exit_failure "Can't install RMagick #{RMAGICK_VERS}. " +
"Can't find the ImageMagick library or one of the dependent
libraries. " +
"Check the mkmf.log file for more detailed information.\n"
end
end
have_func("snprintf", headers)
["AcquireQuantumMemory", # 6.3.5-9
"AcquireImage", # 6.4.1
"AffinityImage", # 6.4.3-6
"AffinityImages", # 6.4.3-6
"ClutImageChannel", # 6.3.5-8
"CompositeLayers", # 6.3.3-?
"ConvertHSLToRGB", # 6.3.5-9
"ConvertRGBToHSL", # 6.3.5-9
"DeskewImage", # 6.4.2-5
"DistortImage", # 6.3.5
"EncipherImage", # 6.3.8-6
"EqualizeImageChannel", # 6.3.6-9
"ExcerptImage", # 6.3.5-8
"ExtentImage", # 6.3.1
"FloodfillPaintImage", # 6.3.7
"GetAuthenticPixels", # 6.4.5-6
"GetImageAlphaChannel", # 6.3.9-2
"GetImageProperty", # 6.3.1
"GetNextImageProperty", # 6.3.1
"GetStringInfoDatum", # 6.3.2
"GetVirtualPixels", # 6.4.5-6
"InterpretImageProperties", # 6.3.2
"IsHistogramImage", # 6.3.5
"LevelImageColors", # 6.4.2
"LevelizeImageChannel", # 6.4.2
"LinearStretchImage", # 6.3.1
"LiquidRescaleImage", # 6.3.8-2
"MagickCoreGenesis", # 6.3.4
"OpaquePaintImageChannel", # 6.3.7-10
"PolaroidImage", # 6.3.1-6
"RecolorImage", # 6.3.1-3
"RemapImage", # 6.4.4-0
"RemoveImageArtifact", # 6.3.6
"ResetImagePage", # 6.3.3
"ResizeQuantumMemory", # 6.3.5-9
"SetImageAlphaChannel", # 6.3.6-9
"SetImageArtifact", # 6.3.6
"SetImageMask", # 6.3.1
"SetImageProperty", # 6.3.1
"SetImageRegistry", # 6.3.4
"SparseColorImage", # 6.3.4-?
"SyncImageProfiles", # 6.3.2
"SyncAuthenticPixels", # 6.4.5-6
"TransparentPaintImage", # 6.3.7-10
"TransparentPaintImageChroma" # 6.4.5-6
].each do |func|
have_func(func, headers)
end
checking_for("QueryMagickColorname() new signature") do
if try_compile(<<"SRC")
#{COMMON_HEADERS}
#{cpp_include(headers)}
/*top*/
int main() {
MagickBooleanType okay;
Image *image;
MagickPixelPacket *color;
char *name;
ExceptionInfo *exception;
okay = QueryMagickColorname(image, color, SVGCompliance, name,
exception);
return 0;
}
SRC
$defs.push("-DHAVE_NEW_QUERYMAGICKCOLORNAME")
true
else
false
end
end
have_struct_member("ImageInfo", "profile", headers) # 6.3.2
have_struct_member("Image", "tile_offset", headers) # 6.3.4
have_struct_member("Image", "type", headers) # ???
have_struct_member("DrawInfo", "kerning", headers) # 6.4.7-8
have_struct_member("DrawInfo", "interword_spacing", headers) #
6.4.8-0
have_type("AlphaChannelType", headers) # 6.3.5
have_type("DitherMethod", headers) # 6.4.2
have_type("ImageLayerMethod", headers) # 6.3.6 replaces
MagickLayerMethod
have_type("SpreadMethod", headers) # 6.3.1
have_type("long double", headers)
#have_type("unsigned long long", headers)
#have_type("uint64_t", headers)
#have_type("__int64", headers)
#have_type("uintmax_t", headers)
#check_sizeof("unsigned long", headers)
#check_sizeof("Image *", headers)
have_enum_value("AlphaChannelType", "CopyAlphaChannel",
headers) # 6.4.3-7
have_enum_value("ColorspaceType", "CMYColorspace",
headers) # 6.3.5
have_enum_values("CompositeOperator",
["ChangeMaskCompositeOp", # 6.3.3
"LinearLightCompositeOp", # 6.3.5
"DivideCompositeOp"],
headers) # 6.3.5
have_enum_values("CompressionType",
["DXT1Compression", # 6.3.9-3
"DXT3Compression", # 6.3.9-3
"DXT5Compression"],
headers) # 6.3.9-3
have_enum_values("DistortImageMethod",
["ArcDistortion", # 6.3.5-5
"BarrelDistortion", # 6.4.2-5
"BarrelInverseDistortion", # 6.4.3-8
"DePolarDistortion", # 6.4.2-6
"PerspectiveProjectionDistortion", # 6.3.5-9
"PolarDistortion", # 6.4.2-6
"PolynomialDistortion", # 6.4.2-4
"ShepardsDistortion"],
headers) # 6.4.2-4
have_enum_value("DitherMethod", "NoDitherMethod",
headers) # 6.4.3
have_enum_values("FilterTypes",
["KaiserFilter", # 6.3.6
"WelshFilter", # 6.3.6-4
"ParzenFilter", # 6.3.6-4
"LagrangeFilter", # 6.3.7-2
"BohmanFilter", # 6.3.7-2
"BartlettFilter", # 6.3.7-2
"SentinelFilter"],
headers) # 6.3.7-2
have_enum_value("InterpolatePixelMethod", "SplineInterpolatePixel",
headers) # 6.3.5
have_enum_values("InterlaceType",
["GIFInterlace", # 6.3.4
"JPEGInterlace", # 6.3.4
"PNGInterlace"],
headers) # 6.3.4
have_enum_values("MagickEvaluateOperator",
["PowEvaluateOperator", # 6.4.1-9
"LogEvaluateOperator", # 6.4.2
"ThresholdEvaluateOperator", # 6.4.3
"ThresholdBlackEvaluateOperator", # 6.4.3
"ThresholdWhiteEvaluateOperator", # 6.4.3
"GaussianNoiseEvaluateOperator", # 6.4.3
"ImpulseNoiseEvaluateOperator", # 6.4.3
"LaplacianNoiseEvaluateOperator", # 6.4.3
"MultiplicativeNoiseEvaluateOperator", # 6.4.3
"PoissonNoiseEvaluateOperator", # 6.4.3
"UniformNoiseEvaluateOperator", # 6.4.3
"CosineEvaluateOperator", # 6.4.8-5
"SineEvaluateOperator", # 6.4.8-5
"AddModulusEvaluateOperator"], # 6.4.8-5
headers)
have_enum_values("MagickLayerMethod",
["OptimizeTransLayer", # 6.3.3-4
"RemoveDupsLayer", # 6.3.3-6
"RemoveZeroLayer", # 6.3.3-6
"CompositeLayer", # 6.3.3-6
"OptimizeImageLayer"],
headers) # 6.3.3-?
have_enum_values("ImageLayerMethod",
["FlattenLayer", # 6.3.6-2
"MergeLayer", # 6.3.6
"MosaicLayer", # 6.3.6-2
"TrimBoundsLayer" ],
headers) # 6.4.3-8
have_enum_value("MetricType", "MeanErrorPerPixelMetric",
headers) # 6.3.4-?
have_enum_value("NoiseType", "RandomNoise",
headers) # 6.3.5-0
have_enum_value("SpreadMethod", "ReflectSpread",
headers) # 6.3.1
have_enum_values("VirtualPixelMethod",
["MaskVirtualPixelMethod", # 6.3.3
"BlackVirtualPixelMethod", # 6.3.5
"GrayVirtualPixelMethod", # 6.3.5
"HorizontalTileVirtualPixelMethod", # 6.4.2-6
"VerticalTileVirtualPixelMethod", # 6.4.2-6
"WhiteVirtualPixelMethod"],
headers) # 6.3.5
# Now test Ruby 1.9.0 features.
headers = ["ruby.h"]
if have_header("ruby/io.h")
headers << "ruby/io.h"
else
headers << "rubyio.h"
end
have_func("rb_frame_this_func", headers)
# Miscellaneous constants
$defs.push("-DRUBY_VERSION_STRING=\"ruby #{RUBY_VERSION}\"")
$defs.push("-DRMAGICK_VERSION_STRING=\"RMagick #{RMAGICK_VERS}\"")
create_header()
# Prior to 1.8.5 mkmf duplicated the symbols on the command line and
in the
# extconf.h header. Suppress that behavior by removing the symbol
array.
$defs = []
# Force re-compilation if the generated Makefile changed.
$config_h = "Makefile rmagick.h"
create_makefile("RMagick2")
SUMMARY = <<"END_SUMMARY"
#{"=" * 70}
#{DateTime.now.strftime("%a %d%b%y %T")}
This installation of RMagick #{RMAGICK_VERS} is configured for
Ruby #{RUBY_VERSION} (#{RUBY_PLATFORM}) and ImageMagick #
{$magick_version}
#{"=" * 70}
END_SUMMARY
Logging::message SUMMARY
message SUMMARY
