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1 Building DynCall with generic makefiles
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2 =======================================
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3
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4
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5 Description
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6 -----------
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7
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8 Makefile.generic is a simple and _hybrid_ make-based build system setup for dyncall,
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9 designed to work with with GNU and BSD make.
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10
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11 This build-flavour supports two operating modes: Embedded and Configure.
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12
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13 Project files are specified in Makefile.generic.
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14
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15
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16 History
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17 -------
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18 During the integration of dyncall into the R package rdyncall, there
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19 was a need for a clean simple build system that could be launched from R
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20 and works with various make's such as GNU, BSD and sun make.
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21
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22
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23 Generic Usage
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24 -------------
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25
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26 [g|bsd]make [-f Makefile.generic] [all|clean|install|...] [INSTALL_TOP=<path>]
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27
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28
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29 Embedded Mode
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30 -------------
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31 Makefile.generic makefiles are taken "as-is" without the need for extra configuration.
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32
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33 <VAR1>=<VALUE1> ... bsdmake -f Makefile.generic
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34 <VAR1>=<VALUE1> ... gmake -f Makefile.generic
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35
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36 (Note that setting an env var as above (<VAR1>=<VALUE1>) before running a command is
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37 shell specific. If your shell doesn't support this, set it according to the shell's
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38 style.)
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39
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40 Example:
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41 dyncall libraries should compile fine on most platforms:
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42
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43 BSDmake:
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44 $ bsdmake -f Makefile.generic
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45
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46 GNUmake:
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47 $ make -f Makefile.generic
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48
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49 The tests sometimes require special attention to additional 'usual' libraries
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50 such as math and dynamic linker run-time libs.
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51 $ LDLIBS="-lm -ldl" make -f Makefile.generic
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52
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53
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54 Configure Mode
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55 --------------
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56
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57 Usage:
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58
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59 cd <build-dir> # build-dir can be arbitrary
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60 ../<path-to-source>/configure [--prefix=<path>]
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61 make
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62 make install [DESTDIR=<path>]
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63
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64 The configure script 'configure' writes 'Makefile' files that
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65 include 'Makefile.generic' and setup variables such as
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66 VPATH, {SRC,BLD}{TOP,DIR}.
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67
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68 Two build types are supported: In-source and out-of-Source.
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69
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70 in-source builds:
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71 Makefile's are created in parallel to the Makefile.generic files.
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72
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73 out-of-source builds:
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74 the configure script is executed from a (possible empty) build directory.
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75 The source directory tree is duplicated into that directory.
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76
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77
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78 Useful Variables
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79 ----------------
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80
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81 For libraries:
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82 CC, CFLAGS, CPPFLAGS
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83 For tests:
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84 CXX, LDLIBS
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85
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86 MAKE_CMD - The make tool (including -f flag) to run sub-directories.
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87 SRCTOP - Source top-level directory (defaults to relative top).
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88 BLDTOP - Build top-level directory (defaults to SRCTOP).
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89 SRCDIR - Source directory (defaults to '.').
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90 BLDDIR - Build directory (defaults to SRCDIR).
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91
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92 e.g. Makefile.generic in source-tree:
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93
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94 SRCTOP ?= ../../../ # relative path to source-top
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95 BLDTOP ?= ${SRCTOP} # defaults for in-source builds
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96 SRCDIR ?= . # relative path to current directory
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97 BLDDIR ?= ${BLDDIR} # relative path to current directory
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98
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99
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100 Include Directories
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101 -------------------
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102 Use -I${SRCTOP}/... to refer to other include directories.
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103
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104
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105 Link Directories
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106 ----------------
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107 Use -L${BLDTOP}/... to refer to other build directories.
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108
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109
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110 Plaform Notes:
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111 --------------
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112 Linux:
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113 - all: ok.
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114 make -f Makefile.generic all
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115 - tests: need 'm' and 'dl' libs.
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116 ( cd tests ; LDLIBS="-lm -ldl" make -f Makefile.generic )
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117 - see batch script: buildsys/scripts/batch-build-linux.sh
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118
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119 Minix: No dynload support. No '-fPIC' is allowed.
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120 - dynload: unsupport, no dynamic linker present in Minix 3.
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121 - dyn{call,callback}: ok, without '-fPIC'!
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122 ( cd dyncall ; CFLAGS= make -f Makefile.generic dyncall dyncallback )
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123 - tests: ok
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124 ( cd test ; make -f Makefile.generic all-dyncall all-dyncallback )
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125 - see batch script: buildsys/scripts/batch-build-minix.sh
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126
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127 NetBSD/FreeBSD:
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128 - all: ok.
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129 make -f Makefile.generic all
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130 - tests: need math lib:
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131 ( cd tests ; LDLIBS="-lm" make -f Makefile.generic )
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132
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133 OpenBSD:
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134 - all: ok.
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135 make -f Makefile.generic all
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136 - tests: *.cpp implicit rule not set, therefore only c tests work:
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137 ( cd tests ; LDLIBS="-lm" make -f Makefile.generic all-c )
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138 - install: ok.
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139
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140 Haiku Alpha 2:
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141 - dynload: elf.h header found, install system source for dynload support
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142 - dyn{call,callback}: ok.
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143 make -f Makefile.generic dyncall dyncallback
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144 - tests: ok
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145 ( cd test ; make -f Makefile.generic all-dyncall all-dyncallback )
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146
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147
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148 Build notes related to dyncall:
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149 -------------------------------
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150
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151 CFLAGS
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152 Use '-fPIC' for at least 64-bit systems and when you want the code to be
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153 included as a shared library or module image.
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154 LDLIBS
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155 Use '-lm' for test/suite - it uses pow function.
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156 Use '-ldl' for dynload examples such as test/nm and test/resolve_self on Linux.
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157
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158
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159 Feature:
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160 --------
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161 configure --prefix=<prefix> -> Makefile DESTDIR=variable
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162 make -f Makefile.generic DESTDIR=<prefix>
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163
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164
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165 Todo:
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166 -----
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167 - sun's make: CXX does not exist.. no rule for *.cpp files but *.cc.
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168
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