Almost working libpq

Makefile

@@ -1,24 +1,67 @@
 PQ_VER ?= 11.12
 SSL_VER ?= 1.1.1k
 
-OUT_DIR ?= out/deps
+# This is such a lovely oneliner
+# NOTE: $(dir PATH) outputs a trailing slash
+OUT_DIR ?= $(dir $(abspath $(lastword $(MAKEFILE_LIST))))out/deps
+
+# Generated variables for ease of use
+PREFIX := $(OUT_DIR)/prefix
+OPENSSL_DIR := $(OUT_DIR)/openssl-$(SSL_VER)
+PQ_DIR := $(OUT_DIR)/postgresql-$(PQ_VER)
+CORES != nproc
 
 export CC=musl-gcc -fPIC -pie -static
+export LD_LIBRARY_PATH=$(PREFIX)
+export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig
+
 
 # TODO check for header files (openssl-dev, libpq-dev) both for Arch & Ubuntu
 
+# Create the out dir
+$(shell mkdir -p "$(PREFIX)")
 
 all: openssl
 .PHONY: all
 
 
 # =====OPENSSL=====
-# Download the source code
-$(OUT_DIR)/openssl-$(SSL_VER)/Configure:
-	mkdir -p '$(OUT_DIR)'
+# Download the source code & configure the project
+$(OPENSSL_DIR)/Configure:
 	curl -sSL "https://www.openssl.org/source/openssl-$(SSL_VER).tar.gz" | \
 		tar -C "$(OUT_DIR)" -xz
+	cd "$(OPENSSL_DIR)" && \
+		CC="$$CC -idirafter /usr/include" ./Configure \
+			no-zlib \
+			no-shared \
+			--prefix="$(PREFIX)" \
+			--openssldir="$(PREFIX)/ssl" \
+			linux-x86_64
 
 # Build OpenSSL
-openssl: $(OUT_DIR)/openssl-$(SSL_VER)/Configure
+openssl: $(OPENSSL_DIR)/Configure
+	C_INCLUDE_PATH="$(PREFIX)/include" $(MAKE) -C "$(OPENSSL_DIR)" depend
+	$(MAKE) -C "$(OPENSSL_DIR)" -j$(CORES)
+	$(MAKE) -C "$(OPENSSL_DIR)" install_sw
 .PHONY: openssl
+
+
+# =====LIBPQ=====
+# Download the source code & configure the project
+$(PQ_DIR)/configure:
+	curl -sSL "https://ftp.postgresql.org/pub/source/v$(PQ_VER)/postgresql-$(PQ_VER).tar.gz" | \
+		tar -C "$(OUT_DIR)" -xz
+	cd "$(PQ_DIR)" && \
+		LDFLAGS="-L$(PREFIX)/lib" CFLAGS="-I$(PREFIX)/include" ./configure \
+			--without-readline \
+			--without-zlib \
+			--with-openssl \
+			--prefix="$(PREFIX)" \
+			--host=x86_64-unknown-linux-musl
+
+libpq: $(PQ_DIR)/configure
+	make -C "$(PQ_DIR)/src/interfaces/libpq" -j$(CORES) all-static-lib
+	make -C "$(PQ_DIR)/src/interfaces/libpq" install install-lib-static
+	make -C "$(PQ_DIR)/src/bin/pg_config" -j $(CORES)
+	make -C "$(PQ_DIR)/src/bin/pg_config" install
+.PHONY: libpq