Re: To Jacob Champion > It turns out that pkg-config is picky when it doesn't find the .pc > files listed in Requires.private. So, without libcurl4-openssl-dev > installed:
What I didn't say explicitly in the last message is that I want to avoid that all programs now build-depending on libpq-dev would have to add libcurl4-openssl-dev, or libpq-dev would have to depend on that. > But CFLAGS is not: > > $ pkgconf --cflags libpq > Package libcurl was not found in the pkg-config search path. Furthermore, with libcurl4-openssl-dev installed, the pkgconf output changes, as said in that FAQ entry: $ pkgconf --cflags libpq -I/usr/include/postgresql -I/usr/include/x86_64-linux-gnu -isystem /usr/include/mit-krb5 -I/usr/include/p11-kit-1 That might be harmless, but we should avoid it. For reference, the current 18.0 behavior: $ pkgconf --libs libpq -lpq $ pkgconf --cflags libpq -I/usr/include/postgresql -I/usr/include/x86_64-linux-gnu -isystem /usr/include/mit-krb5 -I/usr/include/p11-kit-1 $ pkgconf --libs libpq -lpq $ pkgconf --libs --static libpq -lpq -lpgcommon -lpgport -lpq-oauth -lssl -lcrypto -lgssapi_krb5 -lm -lldap -lssl -lz -lzstd -ldl -pthread -lcrypto -lz -lzstd -ldl -pthread -lcurl -lidn2 -llber -lldap -llber -lssh2 -lssl -lcrypto -lcrypto -lunistring -lz -lbrotlidec -lbrotlicommon -lzstd -pthread -L/usr/lib/x86_64-linux-gnu/mit-krb5 -lgssapi_krb5 -L/usr/lib/x86_64-linux-gnu/mit-krb5 -lkrb5 -lk5crypto -lcom_err -lkrb5support -lssl -lz -lzstd -ldl -pthread -lcrypto -lz -lzstd -ldl -pthread -lpsl -lssh2 -lssl -lcrypto -lz -lgpg-error -lcrypto -lzstd -ldl -pthread -lz -lrtmp -lz -lgmp -lgnutls -lgmp -lunistring -latomic -lnettle -lgmp -lnettle -ltasn1 -lidn2 -lunistring -lp11-kit -lhogweed -lgmp -lnettle -lnghttp2 -lnghttp3 (ugh) And after the libpq.pc change I plan: $ pkgconf --cflags libpq -I/usr/include/postgresql $ pkgconf --cflags --static libpq -I/usr/include/postgresql $ pkgconf --libs libpq -lpq $ pkgconf --libs --static libpq -lpq -lpgcommon -lpgport -lpq-oauth -lssl -lcrypto -lgssapi_krb5 -lm -lldap -lcurl -lssl -lz -lzstd -ldl -pthread -lcrypto -lz -lzstd -ldl -pthread Christoph
