Add configure to make builds (percona#80)

Trying to locate json-c library

`Makefile` is gone. It should be generated by configure based on
`Makefile.in`

The `configre` in turn generated by `autoconf` based on `configure.ac`

See https://github.com/Percona-Lab/postgres-tde-ext/wiki/Make-Builds-for-Developers

.github/workflows/postgresql-16-pgdg-package-pgxs.yml

@@ -50,6 +50,7 @@ jobs:
 
       - name: Build postgres-tde-ext
         run: |
+          sudo -u postgres bash -c './configure'
           sudo -u postgres bash -c 'make USE_PGXS=1'
           sudo make USE_PGXS=1 install
         working-directory: src/postgres-tde-ext

.github/workflows/postgresql-16-src-make.yml

@@ -54,6 +54,7 @@ jobs:
 
       - name: Build postgres-tde-ext
         run: |
+          ./configure
           make -j
           sudo make install
         working-directory: src/contrib/postgres-tde-ext

.gitignore

@@ -1,2 +1,9 @@
 *.so
 *.o
+
+/config.cache
+/config.log
+/config.status
+/Makefile
+/autom4te.cache
+/configure~

Makefile → Makefile.in

@@ -35,21 +35,19 @@ src/keyring/keyring_file.o \
 src/keyring/keyring_api.o \
 src/pg_tde.o
 
+override PG_CPPFLAGS += @tde_CPPFLAGS@
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
 override PG_CPPFLAGS += -I$(CURDIR)/src/include
-# TODO: use proper configure for this
-override PG_CPPFLAGS += -I/usr/include/json-c
 include $(PGXS)
 else
 subdir = contrib/postgres-tde-ext
 top_builddir = ../..
 override PG_CPPFLAGS += -I$(top_srcdir)/$(subdir)/src/include
-# TODO: use proper configure for this
-override PG_CPPFLAGS += -I/usr/include/json-c
 include $(top_builddir)/src/Makefile.global
 include $(top_srcdir)/contrib/contrib-global.mk
 endif
 
-SHLIB_LINK += -lcrypto -lssl -ljson-c
+override SHLIB_LINK += @tde_LDFLAGS@ -lcrypto -lssl

README.md

@@ -79,10 +79,13 @@ Compile and install the extension
 
 ```
 cd postgres-tde-ext
+./configure
 make USE_PGXS=1
 sudo make USE_PGXS=1 install
 ```
 
+_See [Make Builds for Developers](https://github.com/Percona-Lab/postgres-tde-ext/wiki/Make-builds-for-developers) for more info on the build infrastructure._
+
 ## Install from package
 
 1. Download the latest [release package](https://github.com/Percona-Lab/postgres-tde-ext/releases)