pkg.m4 5.1 KB

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  1. # pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*-
  2. #
  3. # Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
  4. #
  5. # This program is free software; you can redistribute it and/or modify
  6. # it under the terms of the GNU General Public License as published by
  7. # the Free Software Foundation; either version 2 of the License, or
  8. # (at your option) any later version.
  9. #
  10. # This program is distributed in the hope that it will be useful, but
  11. # WITHOUT ANY WARRANTY; without even the implied warranty of
  12. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13. # General Public License for more details.
  14. #
  15. # You should have received a copy of the GNU General Public License
  16. # along with this program; if not, write to the Free Software
  17. # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18. #
  19. # As a special exception to the GNU General Public License, if you
  20. # distribute this file as part of a program that contains a
  21. # configuration script generated by Autoconf, you may include it under
  22. # the same distribution terms that you use for the rest of that program.
  23. # PKG_PROG_PKG_CONFIG([MIN-VERSION])
  24. # ----------------------------------
  25. AC_DEFUN([PKG_PROG_PKG_CONFIG],
  26. [m4_pattern_forbid([^_?PKG_[A-Z_]+$])
  27. m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
  28. AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl
  29. if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
  30. AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
  31. fi
  32. if test -n "$PKG_CONFIG"; then
  33. _pkg_min_version=m4_default([$1], [0.9.0])
  34. AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
  35. if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
  36. AC_MSG_RESULT([yes])
  37. else
  38. AC_MSG_RESULT([no])
  39. PKG_CONFIG=""
  40. fi
  41. fi[]dnl
  42. ])# PKG_PROG_PKG_CONFIG
  43. # PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
  44. #
  45. # Check to see whether a particular set of modules exists. Similar
  46. # to PKG_CHECK_MODULES(), but does not set variables or print errors.
  47. #
  48. #
  49. # Similar to PKG_CHECK_MODULES, make sure that the first instance of
  50. # this or PKG_CHECK_MODULES is called, or make sure to call
  51. # PKG_CHECK_EXISTS manually
  52. # --------------------------------------------------------------
  53. AC_DEFUN([PKG_CHECK_EXISTS],
  54. [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
  55. if test -n "$PKG_CONFIG" && \
  56. AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
  57. m4_ifval([$2], [$2], [:])
  58. m4_ifvaln([$3], [else
  59. $3])dnl
  60. fi])
  61. # _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
  62. # ---------------------------------------------
  63. m4_define([_PKG_CONFIG],
  64. [if test -n "$PKG_CONFIG"; then
  65. if test -n "$$1"; then
  66. pkg_cv_[]$1="$$1"
  67. else
  68. PKG_CHECK_EXISTS([$3],
  69. [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],
  70. [pkg_failed=yes])
  71. fi
  72. else
  73. pkg_failed=untried
  74. fi[]dnl
  75. ])# _PKG_CONFIG
  76. # _PKG_SHORT_ERRORS_SUPPORTED
  77. # -----------------------------
  78. AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
  79. [AC_REQUIRE([PKG_PROG_PKG_CONFIG])
  80. if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
  81. _pkg_short_errors_supported=yes
  82. else
  83. _pkg_short_errors_supported=no
  84. fi[]dnl
  85. ])# _PKG_SHORT_ERRORS_SUPPORTED
  86. # PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
  87. # [ACTION-IF-NOT-FOUND])
  88. #
  89. #
  90. # Note that if there is a possibility the first call to
  91. # PKG_CHECK_MODULES might not happen, you should be sure to include an
  92. # explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
  93. #
  94. #
  95. # --------------------------------------------------------------
  96. AC_DEFUN([PKG_CHECK_MODULES],
  97. [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
  98. AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
  99. AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
  100. pkg_failed=no
  101. AC_MSG_CHECKING([for $1])
  102. _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
  103. _PKG_CONFIG([$1][_LIBS], [libs], [$2])
  104. m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
  105. and $1[]_LIBS to avoid the need to call pkg-config.
  106. See the pkg-config man page for more details.])
  107. if test $pkg_failed = yes; then
  108. _PKG_SHORT_ERRORS_SUPPORTED
  109. if test $_pkg_short_errors_supported = yes; then
  110. $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --errors-to-stdout --print-errors "$2"`
  111. else
  112. $1[]_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
  113. fi
  114. # Put the nasty error message in config.log where it belongs
  115. echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
  116. ifelse([$4], , [AC_MSG_ERROR(dnl
  117. [Package requirements ($2) were not met:
  118. $$1_PKG_ERRORS
  119. Consider adjusting the PKG_CONFIG_PATH environment variable if you
  120. installed software in a non-standard prefix.
  121. _PKG_TEXT
  122. ])],
  123. [AC_MSG_RESULT([no])
  124. $4])
  125. elif test $pkg_failed = untried; then
  126. ifelse([$4], , [AC_MSG_FAILURE(dnl
  127. [The pkg-config script could not be found or is too old. Make sure it
  128. is in your PATH or set the PKG_CONFIG environment variable to the full
  129. path to pkg-config.
  130. _PKG_TEXT
  131. To get pkg-config, see <http://www.freedesktop.org/software/pkgconfig>.])],
  132. [$4])
  133. else
  134. $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
  135. $1[]_LIBS=$pkg_cv_[]$1[]_LIBS
  136. AC_MSG_RESULT([yes])
  137. ifelse([$3], , :, [$3])
  138. fi[]dnl
  139. ])# PKG_CHECK_MODULES