bug#33085: using myprog_CXXFLAGS with VPATH prevents Makefile from finding sources

[Julien COURTAT]

Hello,

 

Here’s my bug report, I’m building my software out of the source tree, this is called parallel build (very nice feature).

The way to reproduce the issue is very simple, set myprog_CXXFLAGS = -DANY and address@hidden@ and the corresponding Makefile won’t find my source file. Replace myprog_CXXFLAGS by AM_CXXFLAGS and it works well.

Autoconf 2.69, automake 1.13.4

 

Autoconf.ac:

 

AC_PREREQ([2.69])

AC_INIT([myprog], [1.0], address@hidden)

AC_CONFIG_AUX_DIR([autotools_build])

AM_INIT_AUTOMAKE([1.13 -Wall -Werror foreign subdir-objects])

AC_CONFIG_MACRO_DIR([m4])

AC_CONFIG_SRCDIR([src/DFluxMsgStdLib/Makefile.am])

AC_COPYRIGHT([[AQSACOM 2018]])

AC_CANONICAL_BUILD

 

# Checks for programs.

AC_PROG_CC([gcc])

AC_PROG_CXX([g++])

AC_LANG_CPLUSPLUS

m4_ifdef([AM_PROG_AR], [AM_PROG_AR])

AM_SILENT_RULES([yes])

AM_PROG_CC_C_O([gcc])

AX_CXX_COMPILE_STDCXX_11([noext], [mandatory])

AC_CHECK_PROG([LSB_RELEASE],[lsb_release],yes)

LT_INIT()

MYPROG_ROOT_PATH=`cat $COMPONENTS | grep MYPROG_ROOT_PATH | awk -F '=' '{print $2}'`

DEV_HOME_PATH=`cat $COMPONENTS | grep DEV_HOME | awk -F '=' '{print $2}'`

 

# AC_SET_COMPONENT_VAR(FILE, PATTERN, TARGET])

# --------------------------------------------

m4_define([AC_SET_COMPONENT_VAR],

          [{ GREP_LINE=`cat $1 | grep $2`;

             AS_IF([test `echo $GREP_LINE | wc -w` = "3"],

                   AC_SUBST([$3], [$MYPROG_ROOT_PATH/$(echo $GREP_LINE | awk '{ print $[]1 }')-$(echo $GREP_LINE | awk '{ print $[]2 }')]),

                   AC_SUBST([$3], [$(echo $GREP_LINE | awk '{ print $[]1 }')]));}])

 

AC_SET_COMPONENT_VAR([$COMPONENTS], [MYPROG_VAR], [MYPROG_PATH])

CFLAGS="$CFLAGS -pie -fPIE -D_FORTIFY_SOURCE=2 -fstack-protector-all -Wall -Werror -Wformat -Wformat-security"

CXXFLAGS="$CFLAGS $CXXFLAGS"

CPPFLAGS="$CPPFLAGS -D_REENTRANT $VER_LINUX -DPOSTGRESQL"

AC_CONFIG_HEADERS([config.h])

AC_CONFIG_FILES([Makefile])

AC_OUTPUT

 

Makefile.am :

bin_PROGRAMS=myprog

myprog_SOURCES  = Main.cpp

myprog_CXXFLAGS = -DANY

AM_CPPFLAGS  = address@hidden@

address@hidden@

 

 

I tried to set myprog_CXXFLAGS anywhere else in the file, but the issue is still the same. Same behavior applies to myprog_LDADD, myprog_CFLAGS and so on.

Hope my bug report is detailed enough.

 

Julien