Where do I find out how this package was built with ./configure?

Check the contents of the file config.log. That records what happened.

Thanks Ubfan. I don't think I'm explaining this well, so I'll try again. On 12.0.4...I do:

sudo apt-get install squid

This installs the squid package. How do I find out how that squid package was ./configure'd? Thank you.

AH, you can't do that, except by asking the maintainer how they built it. config.log only exists in the source tree, and is very likely not going to be included in a package, still, you could download the package and open it with an archive manager and browse through it, you might get lucky :)

Hamish

The buildlog in launchpad should contain that information.

e.g. squid3 package 3.1.19-1ubuntu3.12.04.2 in ubuntu precise i386
https://launchpad.net/~ubuntu-security/+archive/ppa/+build/4260457

The buildlog contains the line (reformatted for easier reading):

CFLAGS="-g -O2 -fPIE -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Werror=format-security" CXXFLAGS="-g -O2 -fPIE -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Werror=format-security" CPPFLAGS="-D_FORTIFY_SOURCE=2" LDFLAGS="-Wl,-Bsymbolic-functions -fPIE -pie -Wl,-z,relro -Wl,-z,now"
/build/buildd/squid3-3.1.19/./configure
--build=i686-linux-gnu
--prefix=/usr
--includedir="\${prefix}/include"
--mandir="\${prefix}/share/man"
--infodir="\${prefix}/share/info"
--sysconfdir=/etc
--localstatedir=/var
--libexecdir="\${prefix}/lib/squid3"
--srcdir=.
--disable-maintainer-mode
--disable-dependency-tracking
--disable-silent-rules
--datadir=/usr/share/squid3
--sysconfdir=/etc/squid3
--mandir=/usr/share/man
--with-cppunit-basedir=/usr
--enable-inline
--enable-async-io=8
--enable-storeio="ufs,aufs,diskd"
--enable-removal-policies="lru,heap"
--enable-delay-pools
--enable-cache-digests
--enable-underscores
--enable-icap-client
--enable-follow-x-forwarded-for
--enable-auth="basic,digest,ntlm,negotiate"
--enable-basic-auth-helpers="LDAP,MSNT,NCSA,PAM,SASL,SMB,YP,DB,POP3,getpwnam,squid_radius_auth,multi-domain-NTLM"
--enable-ntlm-auth-helpers="smb_lm,"
--enable-digest-auth-helpers="ldap,password"
--enable-negotiate-auth-helpers="squid_kerb_auth"
--enable-external-acl-helpers="ip_user,ldap_group,session,unix_group,wbinfo_group"
--enable-arp-acl
--enable-esi
--enable-zph-qos
--enable-wccpv2
--disable-translation
--with-logdir=/var/log/squid3
--with-pidfile=/var/run/squid3.pid
--with-filedescriptors=65536
--with-large-files
--with-default-user=proxy
--enable-linux-netfilter

Is that the information you are looking for?

Thanks Manfred...that's exactly what I was looking for.