diff options
| -rw-r--r-- | configure.ac | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/configure.ac b/configure.ac index 1e3a8091cd52..8bc14d476d57 100644 --- a/configure.ac +++ b/configure.ac @@ -5,6 +5,19 @@ AC_CONFIG_AUX_DIR(config) AC_PROG_SED +# Detect building from release tarballs (we need less dependencies then) +# by checking for the `.dist-files` file present only in release tarballs +# (created in release.nix). +# For example, we don't need to build the manual or run bison/flex +# parser generators for release tarballs, as those have them pre-generated. +AC_MSG_CHECKING([whether we are building from a release tarball (.dist-files existence)]) +if test -f .dist-files; then + AC_MSG_RESULT(yes; will not require tools that are not needed for building from release tarballs) + building_from_release_tarball=yes; +else + AC_MSG_RESULT(no) +fi + # Construct a Nix system name (like "i686-linux"). AC_CANONICAL_HOST AC_MSG_CHECKING([for the canonical Nix system name]) @@ -119,14 +132,13 @@ if test -z "$$1"; then fi ]) -# Note: Usage of `AC_PATH_PROG(..., ..., false)` indicates that this program -# is not required in all cases. (e.g. not when building from a release tarball). -# The use of `false` isn't ideal, because when used somewhere in the build it -# will silently fail without error message; this should be improved. NEED_PROG(bash, bash) NEED_PROG(patch, patch) -AC_PATH_PROG(flex, flex, false) -AC_PATH_PROG(bison, bison, false) +if test "x$building_from_release_tarball" != x"yes"; then + # Parser generators are pre-built in release tarballs. + NEED_PROG(flex, flex) + NEED_PROG(bison, bison) +fi NEED_PROG(sed, sed) NEED_PROG(tar, tar) NEED_PROG(bzip2, bzip2) @@ -260,7 +272,8 @@ AC_ARG_ENABLE(doc-gen, AC_HELP_STRING([--disable-doc-gen], doc_generate=$enableval, doc_generate=yes) AC_SUBST(doc_generate) -if test "$doc_generate" = yes; then +# The manual is pre-generated in release tarballs. +if test "$doc_generate" = yes && test "x$building_from_release_tarball" != x"yes"; then # Programs required to build the manual NEED_PROG(xmllint, xmllint) NEED_PROG(xsltproc, xsltproc) |