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autoconf: Work around editline not being found on Ubuntu 16.04.

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And probably other Linux distributions with long-term support releases.

Also update manual stating what version is needed;
I checked that 1.14 is the oldest version with which current nix compiles,
and added autoconf feature checks for some functions added in that release
that nix uses.
This commit is contained in:
Niklas Hambüchen 2019-07-01 18:31:54 +02:00
parent 00a450026f
commit 1f97b16b1d
2 changed files with 14 additions and 1 deletions
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11
configure.ac
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@ -171,7 +171,16 @@ PKG_CHECK_MODULES([SQLITE3], [sqlite3 >= 3.6.19], [CXXFLAGS="$SQLITE3_CFLAGS $CX
PKG_CHECK_MODULES([LIBCURL], [libcurl], [CXXFLAGS="$LIBCURL_CFLAGS $CXXFLAGS"])
# Look for editline, a required dependency.
PKG_CHECK_MODULES([EDITLINE], [libeditline], [CXXFLAGS="$EDITLINE_CFLAGS $CXXFLAGS"])
# The the libeditline.pc file was added only in libeditline >= 1.15.2,
# see https://github.com/troglobit/editline/commit/0a8f2ef4203c3a4a4726b9dd1336869cd0da8607,
# but e.g. Ubuntu 16.04 has an older version, so we fall back to searching for
# editline.h when the pkg-config approach fails.
PKG_CHECK_MODULES([EDITLINE], [libeditline], [CXXFLAGS="$EDITLINE_CFLAGS $CXXFLAGS"], [
AC_CHECK_HEADERS([editline.h], [true],
[AC_MSG_ERROR([Nix requires libeditline; it was found neither via pkg-config nor its normal header.])])
AC_SEARCH_LIBS([readline read_history], [editline], [],
[AC_MSG_ERROR([Nix requires libeditline; it was not found via pkg-config, but via its header, but required functions do not work. Maybe it is too old? >= 1.14 is required.])])
])
# Look for libsodium, an optional dependency.
PKG_CHECK_MODULES([SODIUM], [libsodium],

4
doc/manual/installation/prerequisites-source.xml
View file

@ -62,6 +62,10 @@
1.66.0 or higher. It can be obtained from the official web site
<link xlink:href="https://www.boost.org/" />.</para></listitem>
<listitem><para>The <literal>editline</literal> library of version
1.14.0 or higher. It can be obtained from the its repository
<link xlink:href="https://github.com/troglobit/editline" />.</para></listitem>
<listitem><para>The <command>xmllint</command> and
<command>xsltproc</command> programs to build this manual and the
man-pages. These are part of the <literal>libxml2</literal> and