Add separators to make configure.ac easier to read.

src/build/configure.ac

@@ -1,12 +1,15 @@
 # Initialize configuration
+# ----------------------------------------------------------------------------------------------------------------------------------
 AC_PREREQ([2.69])
 AC_INIT([pgBackRest], [2.25dev])
 AC_CONFIG_SRCDIR([version.h])
 
-# Check compiler
+# Check compiler supports C99 standard
+# ----------------------------------------------------------------------------------------------------------------------------------
 AC_PROG_CC_C99
 
-# Enable internal test code and assertions by undefining NDEBUG
+# Set warnings and optimizations based on build type (i.e. production or test)
+# ----------------------------------------------------------------------------------------------------------------------------------
 warning='-Wall -Wextra -Wno-clobbered -Wno-missing-field-initializers'
 
 AC_ARG_ENABLE(
@@ -30,18 +33,22 @@ else
     AC_SUBST(CWARNING, "$warning -Wwrite-strings -Wconversion -Wformat=2 -Wformat-nonliteral -Wstrict-prototypes -Wpointer-arith -Wvla")
 fi
 
-# Set includes
+# Include the build directory
+# ----------------------------------------------------------------------------------------------------------------------------------
 AC_SUBST(CINCLUDE, "-I.")
 
 # Check required pq library
+# ----------------------------------------------------------------------------------------------------------------------------------
 AC_CHECK_LIB([pq], [PQconnectdb], [], [AC_MSG_ERROR([library 'pq' is required])])
 AC_SUBST(CINCLUDE, "$CINCLUDE -I`pg_config --includedir`")
 
 # Check required openssl libraries
+# ----------------------------------------------------------------------------------------------------------------------------------
 AC_CHECK_LIB([crypto], [EVP_get_digestbyname], [], [AC_MSG_ERROR([library 'crypto' is required])])
 AC_CHECK_LIB([ssl], [SSL_new], [], [AC_MSG_ERROR([library 'ssl' is required])])
 
 # Check required xml library
+# ----------------------------------------------------------------------------------------------------------------------------------
 AC_ARG_VAR(XML2_CONFIG, [path to xml2 config utility])dnl
 
 if test -z "$XML2_CONFIG"; then
@@ -55,12 +62,15 @@ AC_CHECK_HEADER(libxml/parser.h, [], [AC_MSG_ERROR([header file <libxml/parser.h
 AC_SUBST(CLIBRARY, "$CLIBRARY `pkg-config libxml-2.0 --cflags`")
 
 # Check required gz library
+# ----------------------------------------------------------------------------------------------------------------------------------
 AC_CHECK_LIB([z], [deflate], [], [AC_MSG_ERROR([library 'z' is required])])
 
 # Check optional lz4 library
+# ----------------------------------------------------------------------------------------------------------------------------------
 AC_CHECK_LIB([lz4], [LZ4F_isError])
 
 # Write output
+# ----------------------------------------------------------------------------------------------------------------------------------
 AC_CONFIG_HEADERS([build.auto.h])
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT

src/configure

@@ -2041,7 +2041,8 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
-# Check compiler
+# Check compiler supports C99 standard
+# ----------------------------------------------------------------------------------------------------------------------------------
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -3009,7 +3010,8 @@ fi
 
 
 
-# Enable internal test code and assertions by undefining NDEBUG
+# Set warnings and optimizations based on build type (i.e. production or test)
+# ----------------------------------------------------------------------------------------------------------------------------------
 warning='-Wall -Wextra -Wno-clobbered -Wno-missing-field-initializers'
 
 # Check whether --enable-test was given.
@@ -3045,11 +3047,13 @@ else
 
 fi
 
-# Set includes
+# Include the build directory
+# ----------------------------------------------------------------------------------------------------------------------------------
 CINCLUDE="-I."
 
 
 # Check required pq library
+# ----------------------------------------------------------------------------------------------------------------------------------
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PQconnectdb in -lpq" >&5
 $as_echo_n "checking for PQconnectdb in -lpq... " >&6; }
@@ -3102,6 +3106,7 @@ CINCLUDE="$CINCLUDE -I`pg_config --includedir`"
 
 
 # Check required openssl libraries
+# ----------------------------------------------------------------------------------------------------------------------------------
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EVP_get_digestbyname in -lcrypto" >&5
 $as_echo_n "checking for EVP_get_digestbyname in -lcrypto... " >&6; }
 if ${ac_cv_lib_crypto_EVP_get_digestbyname+:} false; then :
@@ -3198,6 +3203,7 @@ fi
 
 
 # Check required xml library
+# ----------------------------------------------------------------------------------------------------------------------------------
 
 if test -z "$XML2_CONFIG"; then
     XML2_CONFIG="pkg-config libxml-2.0"
@@ -3661,6 +3667,7 @@ CLIBRARY="$CLIBRARY `pkg-config libxml-2.0 --cflags`"
 
 
 # Check required gz library
+# ----------------------------------------------------------------------------------------------------------------------------------
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for deflate in -lz" >&5
 $as_echo_n "checking for deflate in -lz... " >&6; }
 if ${ac_cv_lib_z_deflate+:} false; then :
@@ -3710,6 +3717,7 @@ fi
 
 
 # Check optional lz4 library
+# ----------------------------------------------------------------------------------------------------------------------------------
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LZ4F_isError in -llz4" >&5
 $as_echo_n "checking for LZ4F_isError in -llz4... " >&6; }
 if ${ac_cv_lib_lz4_LZ4F_isError+:} false; then :
@@ -3757,6 +3765,7 @@ fi
 
 
 # Write output
+# ----------------------------------------------------------------------------------------------------------------------------------
 ac_config_headers="$ac_config_headers build.auto.h"
 
 ac_config_files="$ac_config_files Makefile"