I solved this one and it had nothing to do with the version of the nghttp library. I did not have the development environment for nghttp installed. Installing libnghttp2-devel.x86_64 resolved the problem and the compilation ran to completion. [The following applies specifically to Fedora 25; I don't know if it is applicable to other current distros.] For what it's worth, this is the second time I have got caught this way on this project. Last time it was pcre. Installing the programme using dnf (replacement for rpm/yum) doesn't also install the development components, if any. You can find out if any exist by running 'dnf search name' and if name-devel exists it will be listed. Regards, John ========================================== On Wednesday 15 March 2017 03:32:49 Konstantin Kolinko wrote: > The source code: > > https://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/modules/http2/c > onfig2.m4?revision=1779742&view=markup#l124 > > > AC_MSG_CHECKING([for nghttp2 version >= 1.2.1]) > > Just prints the "Checking..." message. The actual check is below - > compilation of some snippet. > > > AC_TRY_COMPILE([#include <nghttp2/nghttp2ver.h>],[ > > If compilation and test succeed then the following assignment happens: > "ac_cv_nghttp2=yes". > > > Apparently the compilation and test failed, and the variable was not > assigned. > > The following block > > > if test "x$ac_cv_nghttp2" = "xyes"; then > > [ a lot of lines checking capabilities and setting some flags ] > > else > > > > AC_MSG_WARN([nghttp2 version is too old]) > > > > fi > > The "if" branch was skipped and "else" branch printed the warning. > > > I suggest you to check what is the actual value of NGHTTP2_VERSION_NUM. > > > checking for user-provided nghttp2 base directory... > > Try to specify the path explicitly, > --with-nghttp2=PATH > > 2017-03-15 2:15 GMT+03:00 John Iliffe <john.iliffe@xxxxxxxxx>: > > I'm not sure it is evident that there is a question buried in the notehttp --enable-proxy-fcgi --enable-http2 --with-nghttp2 --enable-info > > below so here is a precis of what I asked: > > > > 1. the requirement is for nghttp2 at level 1.2.1 whereas I have > > nghttp2 1.13.0 installed. Why is that considered lower than the > > requirement? > > > > 2. assuming (always a bad idea) that the problem is that the compiler > > is checking for some specific link in the nghttp2 library, is it > > likely that what I really need to do is install a back level, and if > > so, any idea what it is looking for? ..or what back level is > > required? > > > > Sorry for the confusion. > > > > John > > ==================================== > > > > On Tuesday 14 March 2017 10:25:27 you wrote: > >> OK, I will have to see what I can do with Fedora, probably not much > >> in this case. > >> > >> My question though was that the version I have is 1.13.0 according to > >> rpm. That would seem to be higher than 1.2.1 so why would the > >> compiler complain? I assume that it has an internal requirement on > >> the library that it didn't find? > >> > >> In that case it might be necessary to back off a few levels to find > >> whatever the compiler wants? > >> > >> Regards, > >> > >> John > >> ================================= > >> > >> > On Tuesday 14 March 2017 02:39:23 you wrote: > >> > > You really need to approach your package maintainer, I picked up > >> > > nghttp2 around that same point a year ago and never had an issue. > >> > > > >> > > Anything to do with rpm installs is on the maintainer, and has > >> > > nothing to do with this project, sorry we can't be of more help. > >> > > > >> > > On Sun, Mar 12, 2017 at 3:12 PM, John Iliffe > >> > > <john.iliffe@xxxxxxxxx> > >> > >> wrote: > >> > > > I am trying to compile Apache 2.4.25 on Fedora 25 Linux. > >> > > > > >> > > > The current version of nghttp2 is installed: > >> > > > > >> > > > ----------------------------- > >> > > > [John@prod04 httpd-2.4.25]$ rpm -qv nghttp2 > >> > > > nghttp2-1.13.0-2.fc25.x86_64 > >> > > > ----------------------------- > >> > > > > >> > > > ----------------------------- > >> > > > /usr/lib64/libnghttp2.so.14 > >> > > > /usr/lib64/libnghttp2.so.14.9.0 > >> > > > ----------------------------- > >> > > > > >> > > > To me, these would both seem to be greater than 1.2.1, but I am > >> > > > getting this error from configure: > >> > > > > >> > > > ---------------------------------------------- > >> > > > checking for nghttp2... checking for user-provided nghttp2 base > >> > > > directory... none > >> > > > checking for pkg-config along ... checking for nghttp2 version > >> > > > >= 1.2.1... FAILED > >> > > > configure: WARNING: nghttp2 version is too old > >> > > > no > >> > > > checking whether to enable mod_http2... configure: error: > >> > > > mod_http2 has been requested but can not be built due to > >> > > > prerequisite failures > >> > > > ------------------------------------------------ > >> > > > > >> > > > These are the currently available versions from the Fedora > >> > > > repository. > >> > > > > >> > > > Has anyone any suggestions as to why this might be occurring? > >> > > > > >> > > > Thanks in advance. > >> > > > > >> > > > John > >> > > > =================================== > >> > > > > >> > > > --------------------------------------------------------------- > >> > > > --- -- - To unsubscribe, e-mail: > >> > > > users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, > >> > > > e-mail: users-help@xxxxxxxxxxxxxxxx > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx > > For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx > For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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